Smell or taste? (5)
I believe the answer is:
sense
I believe this clue is a double definition.
'smell' is the first definition.
(I've seen this in another clue)
'taste?' is the second definition.
(taste is a kind of sense)
(Other definitions for sense that I've seen before include "Realistic attitude" , "Be vaguely aware of" , "Divine" , "Eg, sight, smell" , "Purport" .)