Evening meal (6)
(Other definitions for dinner that I've seen before include "Repast" , "What feeds" , "Supper" , "Main meal of day" , "Evening meal" .)
'evening meal' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for supper that I've seen before include "Light, late, meal" , "Evening 2 Down" , "Last meal of the day" , "Early evening meal" , "has one had a few drinks?" .)