Bananas selected, as in food shop (12)
I believe the answer is:
delicatessen
'food shop' is the definition.
(synonyms)
'bananas selected as in' is the wordplay.
'bananas' indicates an anagram (bananas can informally mean crazy).
'selected'+'as'+'in'='selectedasin'
'selectedasin' with letters rearranged gives 'DELICATESSEN'.
(Other definitions for delicatessen that I've seen before include "food store?" , "Fine foods shop" , "Seller of fine foods" , "where to get fare from abroad" , "Shop selling unusual or foreign prepared food" .)