Enough to taste? Not initially (5)
I believe the answer is:
ample
'enough' is the definition.
(I've seen this in another clue)
'taste? not initially' is the wordplay.
'taste?' becomes 'sample' (synonyms).
'not initially' means to remove the first letter.
'sample' with its first letter taken away is 'AMPLE'.
'to' acts as a link.
(Other definitions for ample that I've seen before include "Large, capacious" , "Plentiful, quite enough" , "Adequate" , "Quite sufficient, more than enough" , "Plentiful; capacious" .)