Abandon pudding without seconds (6)
I believe the answer is:
desert
'abandon' is the definition.
(desert can mean to leave or abandon)
'pudding without seconds' is the wordplay.
'pudding' becomes 'dessert' (I've seen this before).
'without' is a deletion indicator.
'seconds' becomes 's'.
'dessert' with 's' taken away is 'DESERT'.
(Other definitions for desert that I've seen before include "Abandon in wasteland" , "Leave - due" , "Arid area of sand" , "Leave; arid area" , "land too dry to raise crops" .)