City store stocking fish at last (5)
I believe the answer is:
delhi
'city' is the definition.
(Delhi is an example)
'store stocking fish at last' is the wordplay.
'store' becomes 'deli' (deli is a kind of store**).
'stocking' is an insertion indicator ('stock' can mean 'carry' or 'contain').
'at last' suggests the final letters.
The last letter of 'fish' is 'h'.
'deli' going around 'h' is 'DELHI'.
(Other definitions for delhi that I've seen before include "Indian capital city" , "Capital at one time" , "Indian territory" , "Capital on the river Jumna" , "Capital of India" .)