Sample food in one sense (5)
I believe the answer is:
taste
This clue is a double definition.
'sample food' is the first definition.
(I've seen this before)
'one sense' is the second definition.
(taste is one of the five senses)
'in' is the link.
(Other definitions for taste that I've seen before include "Small sample of food" , "eat only the smallest amount" , "Take mouthful" , "Sample - discrimination" , "gains experience" .)