Floored by Spinner in the SE corner.
ACROSS
1 Co-graduate swallowed by foal (6) COBALT {CO{BA}LT}
4 City where you open aperture and shoot nature endlessly (3,5) ABU DHABI {A}{BU D}{HABIt}
10 Ruin a meal with a trace of chilly (7) SCUPPER {S{C}UPPER}
11 Caught the girl with the reporter, but there was nothing between
them (7) LASSOED {LASS}{O}{ED}
12 Tailor exchanged unstrapped top for nothing with the client
(8) CUSTOMER C(-o+u)UST(-u+o)OMER
13 Elongated circular on blog (6) OBLONG*
15 Returning wagon has unknown vessels (4) NAVY {NAV <=}{Y}
17 CIA carved out stuff related to the corpse (9) CADAVERIC*
20 A twist in the sequence given by one from Aspartame’s family
(9) CYCLAMATE {CYCL{A}{MAT}E}
21 Wobble over and smirk (4) LEER <=
24 Plaster and return occupants’ lost container (6) STUCCO OCCUpanTS<=
25 Tramples small kids who belong to just one of a pair (8) (Addendum - STEPSONS {STEPS ON}{S}- See comments)
28 NRI has a way to pay almost all the money (7) EMIGREE {EMI}{GREEn}
29 Jazzy, furry kid exposed to the Italian football team (7) (Addendum - AZZURRI {jAZZy}{fURRy}{kId} - See comments)
30 I’m back in quiet house (8) DOMICLE {DO{MI<=}CILE}
31 The first miss… … (6) (Addendum - MAIDEN [MD] - See comments)
DOWN
1 Windows, say, in a church adhere to slope-ratio (8) COSECANT {C{OS}E}{CANT}
3 The French penny and 2000 pounds equal a Greek coin (6) LEPTON {LE}{P}{TON}
5 A shock, if it’s from the family of 15,19 and 27 (4) BOLT [CD]
6 Girl’s first assistant fleeced the handicapped (8) DISABLED {DI'S}{A}{BLED}
7 Express regret for Ground-Zero spoilage (9) APOLOGISE {O+SPOILAGE}*
9 Military command from Mars? (5,4) ORDER ARMS *{MARS}
14 Drunken stalwarts might have used this at the end of the party
(4,5) LAST STRAW*
16 Following order, omit survey for lack of time (9) VOYEURISM {OMIt+SURVEY}* Definition seems inappropriate? (See comments.)
18 Energy plastic circlet cannot transmit? (8) ELECTRIC {E}{LECTRIC} Definition not clear (&lit - See comments)
19 Second prize in the kitty for Scot of old German origin? (8) (Addendum - PRUSSIAN {P{R}USS}{IAN} - See comments)
22 Mount Chimborazo, at first, was part of Andes by arrangement
(6) ASCEND {AS{C}END*}
26 Had a row with old attorney at first, and was embarrassed
(5) OARED {O}{A}{RED}
27 Pinch the head off the duck (4) TEAL sTEAL


