Taste extremely sweet date (5)
I believe the answer is:
tryst
'date' is the definition.
(I know that tryst is a type of date)
'taste extremely sweet' is the wordplay.
'taste' becomes 'try' (try can mean to taste some food).
'extremely' means to remove the middle letters (letters on the extremes of the word are used).
'sweet' with its middle removed is 'st'.
'try'+'st'='TRYST'
(Other definitions for tryst that I've seen before include "private appointment" , "Rendezvous - assignation" , "cattle-fair" , "meeting-place" , "meeting with another person" .)