No 12691, Tuesday 30 Jul 2019, Spinner

ACROSS
1   Wordplay is hard to take advantage of (6) PUNISH {PUN}{IS}{H}
4   A ball with very small proceeds (8) ADVANCES {A}{D{V}ANCE}{S}
10 Scrub bishop filled with filth (7) RUBBISH [T]
11 Fractured season beginning to derail around first of January (7) INJURED {IN{Ja...y}URE}{De...l}
12 After six balls, near defeat! (8) OVERCOME {OVER}{COME}
13 Handy fuel wasted by American (6) USEFUL {FUEL*}{US}
15 Exploit group after money (4) MILK {M}{ILK}
17 Style fest turned into medium for viral propagation in Africa (6,3) TSETSE FLY*

20 Check fraud's caravan (9) CONSTRAIN {CONS}{TRAIN}
21 Spotted amongst returning brigade yesterday (4) EYED [T<=]
24 Everyone runs around the day before pre-university course (1,5) A-LEVEL {AL{EVE}L}
25 Firm overwhelmed by extraordinary income of money (8) ECONOMIC {E{CO}NOMIC*}
28 Be suspended, having patched up bad clutch (7) HANDBAG {HAN{BAD*}G}
29 Perhaps a very small mark that's red? (7) SCARLET {SCAR}{LET} Anno for LET pending See comments
30 Awareness to retain differentiator, creating anticipation (8) SUSPENSE {S{USP}ENSE}
31 Cold reduced and fizzled out (6) CEASED {C}{EASED}

DOWN
1   Renders each version on point (8) PERFORMS {PER}{FORM}{S}
2   In part, snob leverages aristocrat (5) NOBLE [T]
3   Control ultimately helps one producing spells (6) SWITCH {h..pS}{WITCH}
5   Physician's patent, say, for medical apparatus? (4) DRIP {DR}{IP}
6   Corrected exactly after commercial by editor (8) ADJUSTED {AD}{JUST}{ED}
7   Clue fairly complicated? Not Spinner's, precisely! (9) CAREFULLY {CLUE+FAiRLY}*
8   Deal accepts demand draft for hamper (6) SADDLE {SA{DD}LE}
9   Call to embrace theism destroyed by science (9) CHEMISTRY {CR{THEISM*}Y}
14 Steps from affected castes gaining voice (9) STAIRCASE {ST{AIR}CASE*}
16 Solo needs tightening up of unresolved parts (5,4) LOOSE ENDS*
18 Piece together animal insignia missing tail (8) ASSEMBLE {ASS}{EMBLEm}
19 Erudite is dead cute, somehow (8) EDUCATED*
22 Cleans up wife's remains (6) WASHES {W}{ASHES}
23 Mellow following England's win (6) ENGAGE {EN}{GAGE} Gage/Mellow? (Addendum - {AGE} after {ENG} - See comments)
26 Beer poured into empty mugs for men (5) MALES {Mu{ALE}gS}
27 Periods – a girl's everyday suffering, basically (4) AGES Acrostic

Reference List
Hard = H, Very = V, Small = S, Money = M, Firm = CO, Differentiator = USP, Cold = C, Point = S, Patent = IP, Commercial = AD, Editor = ED, Wife = W, England = EN

GRID