Appetising, pleasantly warm bagel's put away (5)
I believe the answer is:
tasty
'appetising' is the definition.
(I've seen this before)
'pleasantly warm bagel's put away' is the wordplay.
'pleasantly warm' becomes 'toasty' (I've seen this in another clue).
'bagel' becomes 'O' (bagel can mean a score of zero in tennis).
'put away' is a deletion indicator.
'toasty' with 'o' removed is 'TASTY'.
(Other definitions for tasty that I've seen before include "Scrumptious" , "Attractive, appealing" , "Pleasant to savour" , "Appetizing" , "Appetising, having pleasant flavour" .)