10a Developer’s provided with tricks and hints (8)
S*U*C*N* SOUPCONS ?
22a A guy carrying mug and small tumblers (8)
A*R*B*T* ACROBATS ?
12a A perhaps reflective number from The Edge (4-2)
S*D*O* SIDE- ON ?
10a yes, soupçons, soup (an informal term for photographic developer) + cons
12a yes side-on (old 45s had an "A" and "B" side) + no (number) reversed (reflective)