In supermarkets we desire vegetables (6)
I believe the answer is:
swedes
'vegetables' is the definition.
(swede is a kind of vegetable)
'in supermarkets we desire' is the wordplay.
'in' indicates the answer is hidden within the clue.
'SWEDES' can be found hidden inside 'supermarkets we desire'.
(Other definitions for swedes that I've seen before include "Root vegetables" , "Turnips for Scandinavians" , "Europeans and turnips" , "Turnips from Scandinavia?" .)