Gong finally heard during dinner? (5)
I believe the answer is:
medal
'gong' is the definition.
(gong can mean a prize or medal)
'finally heard during dinner?' is the wordplay.
'finally' indicates one should take the final letters.
'during' means one lot of letters goes inside another.
'dinner?' becomes 'meal' (dinner is a meal).
The final letter of 'heard' is 'd'.
'd' placed inside 'meal' is 'MEDAL'.
(Other definitions for medal that I've seen before include "Religious or commemorative pin" , "Lamed (anag)" , "Decorative award" , "Award for achievement" , "Piece of metal as award or in commemoration" .)