Full game of golf enjoyed — exhausted! (7)
I believe the answer is:
rounded
'full' is the definition.
(I've seen this before)
'game of golf enjoyed exhausted' is the wordplay.
'game of golf' becomes 'round' (I've seen this before).
'exhausted' suggests removing the centre (the word is emptied out or exhausted).
'enjoyed' with its centre taken out is 'ed'.
'round'+'ed'='ROUNDED'
(Other definitions for rounded that I've seen before include "full" , "Well-developed; curved" , "(Of the lips) pursed" , "Well-developed; balanced" , "Complete and balanced; made curved" .)