Coffee cup taken back in the end (9)
I believe the answer is:
demitasse
'coffee cup' is the definition.
(demitasse is a kind of coffee cup)
'taken back in the end' is the wordplay.
'taken' becomes 'sat' (sit can mean to take an exam).
'back' says the letters should be written backwards.
'in the' is an insertion indicator.
'end' becomes 'demise' (demise is a kind of end).
'sat' reversed gives 'tas'.
'tas' going within 'demise' is 'DEMITASSE'.
(Other definitions for demitasse that I've seen before include "little cup" , "Coffee-cup" , "Small cup for black coffee" .)