Under pressure returning sweets (8)
I believe the answer is:
stressed
'under pressure' is the definition.
(I've seen this in another clue)
'returning sweets' is the wordplay.
'returning' shows that the letters should be reversed in order.
'sweets' becomes 'desserts' (sweet can mean a dessert or pudding).
'desserts' back-to-front is 'STRESSED'.
(Other definitions for stressed that I've seen before include "Screwed up" , "exerted pressure" , "Accentuated or strained" , "Brought out" , "Insisted" .)