Father, terribly tired, had a good time (7)
I believe the answer is:
partied
'had a good time' is the definition.
(I've seen this before)
'father terribly tired' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'terribly' indicates anagramming the letters.
'tired' is an anagram of 'rtied'.
'pa'+'rtied'='PARTIED'
(Other definitions for partied that I've seen before include "Celebrated" , "Had a good time" .)