Snore terribly, receiving fine, in game (7)
I believe the answer is:
snooker
'game' is the definition.
(snooker is a game)
'snore terribly receiving fine' is the wordplay.
'terribly' indicates anagramming the letters.
'receiving' means one lot of letters goes inside another.
'fine' becomes 'ok' (synonyms).
'snore' with letters rearranged gives 'snoer'.
'snoer' enclosing 'ok' is 'SNOOKER'.
'in' acts as a link.
(Other definitions for snooker that I've seen before include "Game played on a billiards table" , "Potting game" , "Type of billiards" , "Tabletop game" , "Game played with 15 red balls, six of other colours and a white one" .)