Concerned with now ended meal (6)
I believe the answer is:
repast
'meal' is the definition.
(repast can mean a meal)
'concerned with now ended' is the wordplay.
'concerned with' becomes 're' (re can mean regarding, concerning).
'now ended' becomes 'past' (in the past).
're'+'past'='REPAST'
(Other definitions for repast that I've seen before include "A formal sort of meal" , "Something to eat" , "A meal concerning time gone by" , "Feast, meal" , "Food - tapers (anag)" .)