SunWeb11 by Athos

Welcome to SunWeb11. Give it a go and let me know, how you get on.

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ACROSS
1 Sounds like this condition is the rub after your boy, in hot conditions (9)
9 Cut off the North, between the rose and the leek (6)
10 This red mitten can do some damage (9)
11 In the mood, for a game piece or a half-mask (6)
12 For the bigot to ascertain (9)
13 This young feline upgraded initially to a thousand, for a warm hand (6)
17 If I had this little light, I would have done nothing (3)
19 Ugh, without you around, is not slow and not gold (7)
20 XINXE is severe, I hear (7)
21 The Reverend Mother lost her donkey and came back, on her way out to sea (3)
23 Not so esoteric, to tell the tale (6)
27 Mai, what a tumult, for the final demand (9)
28 Heat rays in the spit, a djinn (6)
29 Not B little it around, for a tickle (9)
30 This stranger is no saint, alone with a gg called Ag (6)
31 It’s torn, reckoned after a fine fabric (9)

DOWN
2 Neville is after you before the North, patchy (6)
3 This priest is about for a magical little one (6)
4 Note, about a thousand went with Noah's craft (6)
5 Sounds like you can get bargain relations down south (7)
6 Sounds like the young horse I had eaten, to take the leaves off (9)
7 Bitten the fig, how appropriate (9)
8 Reads on the media, lightweights after Anne (9)
14 Sounds like a certain support for her after a thousand, although open to be fired through (9)
15 These acorns fit into parts (9)
16 You and me are back and dirtied, without interruption (9)
17 This revolutionary has lost out in the lychee, but stays caustic (3)
18 Summon back (3)
22 It's all in a degree, over in the West (7)
24 504 I have had, to cut it up (6)
25 The bloomer, father and fifty one in a laugh (6)
26 In a relative way, she goes north after Oz with a cravat (6)

Full Solution
ACROSS
1 sunstroke.
SUN [ son = your boy] + STROKE [ rub]
9 Severn.
SEVER + N
10 detriment.
RED + MITTEN [anagram]
11 domino.
IN + MOOD [anagram]
12 sectarian.
ASCERTAIN [anagram]
13 mitten.
[K] + ITTEN replace K with M
17 led.
[ID] + LED
19 mercury.
Not slow =quick, not gold = silver i.e.QUICKSILVER = HG = mercury
20 intense.
IN in between X’s i.e. TENS + E sounds like INTENSE
21 ebb.
A +[ BBE] + SS, back
23 recite.
E + [SO] + TERIC [anagram]
27 ultimatum.
MAI + TUMULT [anagram]
28 spirit.
SP +[ IR = infra red rays] + IT
29 titillate.
Not B i.e. A + LITTLE + IT [anagram]
30 ranger.
[ST] + RANGER {the Lone Ranger and his horse [gg] called Silver [Ag=chemical symbol for Silver]}
31 lacerated.
LACE + RATED

DOWN
2 uneven.
U + NEV + EN
3 sprite.
PRIEST [anagram]
4 remark.
RE + M + ARK
5 Kinsale.
KIN + SALE
6 defoliate.
DE[the] + FOL[foal] + I + ATE
7 befitting.
BITTEN + FIG [anagram]
8 Announces.
ANN + OUNCES
14 embrasure.
EM [sounds like M= a thousand] + BRA + SURE
15 Fractions.
ACORNS + FIT [anagram]
16 sustained.
SU [ us back] + STAINED
17 lye.
LY + [CHE] + E
18 dib.
DIB
22 Ballina.
B + [ALL + IN] + A
24 divide.
DIV [Roman numeral 501] + IDE
25 dahlia.
DA + H + [LI] + A
26 auntie.
AU + N + TIE

Solved Grid