Shop with decent sales I redeveloped (12)
I believe the answer is:
delicatessen
'shop' is the definition.
(delicatessen is a kind of shop)
'decent sales i redeveloped' is the wordplay.
'redeveloped' indicates anagramming the letters.
'decent'+'sales'+'i'='decentsalesi'
'decentsalesi' anagrammed gives 'DELICATESSEN'.
'with' acts as a link.
(Other definitions for delicatessen that I've seen before include "Here one gets exotic foods" , "Unusual foods here" , "Rich food had here, perhaps?" , "Specialised food shop" , "Rare food shop" .)