Talk about a series of shops (5)
I believe the answer is:
chain
'series of shops' is the definition.
(I've seen this before)
'talk about a' is the wordplay.
'talk' becomes 'chin' (I've seen this in another clue).
'about' means one lot of letters goes inside another.
'chin' placed around 'a' is 'CHAIN'.
(Other definitions for chain that I've seen before include "Concatenation" , "series of hotels" , "Fetter" , "series of shops" , "It's as strong as its weakest link" .)