Try a new dish (4)
I believe the answer is:
tray
'dish' is the definition.
(thesaurus)
'try a new' is the wordplay.
'new' is an anagram indicator.
'try'+'a'='trya'
'trya' is an anagram of 'TRAY'.
(Other definitions for tray that I've seen before include "Informal meal" , "Flat utensil for carrying meal" , "Domestic carrier" , "canteen item" , "Board for carrying items" .)