Fancy starter of unusual pâté enjoyed with relish? (3,2)
I believe the answer is:
ate up
'enjoyed with relish?' is the definition.
(I've seen this in another clue)
'fancy starter of unusual pate' is the wordplay.
'fancy' indicates an anagram.
'starter of' says to take the initial letters.
The initial letter of 'unusual' is 'u'.
'u'+'pate'='upate'
'upate' is an anagram of 'ATE UP'.
(Other definitions for ate up that I've seen before include "Absorbed" , "Squandered" , "preoccupied" .)