1 gave in, on seeing a citadel put asunder (11) C---h--a---
3a. How one's PIN pre-empts sweets being provided (11) p--p--m---s
16a. Whipped, this ran away (about to feel sick) -l--l--
12d. Where to keep foodstuffs, an ancient street or in a cage (4,7) C-----o-a-e