A farce, race had to be fixed (7)
I believe the answer is:
'a farce' is the definition.
(I've seen this before)
'race had to be fixed' is the wordplay.
'to be fixed' indicates an anagram.
'racehad' anagrammed gives 'CHARADE'.
(Other definitions for charade that I've seen before include "Farce - mime", "Farcical pretence", "An absurd pretence, or a guessing game", "absurd behaviour", "Ludicrous pretence".)