Gongs finally heard during meals (6)
I believe the answer is:
medals
'gongs' is the definition.
(I've seen this before)
'finally heard during meals' is the wordplay.
'finally' says to take the final letters.
'during' means one lot of letters goes inside another.
The last letter of 'heard' is 'd'.
'd' inserted within 'meals' is 'MEDALS'.
(Other definitions for medals that I've seen before include "Military decorations" , "Awards for damsel" , "Gongs" , "Metal discs given as awards" , "Small metal discs as awards - think Olympic games" .)