Part of spoof actually is for real (7)
I believe the answer is:
factual
'real' is the definition.
('factual' can be a synonym of 'real')
'part of spoof actually is' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'FACTUAL' is hidden in the letters of 'spoof actually is'.
'for' acts as a link.
(Other definitions for factual that I've seen before include "like a TV documentary?" , "Relating to reality" , "True to life" , "Based on reality" , "Based on things known to be true" .)