A lot of shops brought back supplier of wool (5)
I believe the answer is:
llama
'supplier of wool' is the definition.
(I've seen this before)
'a lot of shops brought back' is the wordplay.
'lot of shops' becomes 'mall' (a large shopping centre).
'brought back' shows that the letters should be reversed in order.
'a'+'mall'='amall'
'amall' in reverse letter order is 'LLAMA'.
(Other definitions for llama that I've seen before include "South American cud-chewing mammal" , "20vian beast" , "South American beast of burden" , "South American pack animal" , "Andean 'camel'" .)