Galas distributed an up-and-coming dish (7)
I believe the answer is:
lasagna
'dish' is the definition.
(lasagna is a kind of dish)
'galas distributed an up-and-coming' is the wordplay.
'distributed' is an anagram indicator.
'up-and-coming' says the letters should be written in reverse.
'an' reversed gives 'na'.
'galas' anagrammed gives 'lasag'.
'lasag'+'na'='LASAGNA'
(Other definitions for lasagna that I've seen before include "pasta's provided" , "Calorie-rich food" , "Broad flat pasta" , "Italian food" , "Italian cooking" .)