Very little in supermarket in York (4)
I believe the answer is:
tiny
'very little' is the definition.
'in supermarket in york' is the wordplay.
'in' indicates a hidden word.
'TINY' is hidden in the letters of 'supermarket in york'.
(Other definitions for tiny that I've seen before include "Minute, diminutive" , "Underdeveloped" , "Wee" , "Diminutive; small" , "pocket" .)