First morsel consumed by hawk, in a sense (5)
I believe the answer is:
smell
'sense' is the definition.
(I know that sense can be written as smell)
'first morsel consumed by hawk' is the wordplay.
'first morsel' becomes 'm' (1st letter of 'morsel').
'consumed by' is an insertion indicator (inserted letters get consumed).
'hawk' becomes 'sell' (I've seen this in other clues).
'm' going within 'sell' is 'SMELL'.
'in a' is the link.
(Other definitions for smell that I've seen before include "stink" , "Scent" , "Nasal sense" , "Perceive through the nose" , "Hum" .)