Little group of shops are broken into by villain (6)
I believe the answer is:
arcade
'little group of shops' is the definition.
(a row of shops)
'are broken into by villain' is the wordplay.
'broken into by' means one lot of letters goes inside another.
'villain' becomes 'cad' (cad can mean a nasty person).
'are' going around 'cad' is 'ARCADE'.
(Other definitions for arcade that I've seen before include "Covered passageway with shops and stalls" , "shopping precinct" , "Here one may find shops" , "Covered passage containing shops" , "Colonnade" .)