Majority of scandal is false (4)
I believe the answer is:
sham
'is false' is the definition.
(thesaurus)
'majority of scandal' is the wordplay.
'majority of' means to remove the last letter.
'scandal' becomes 'shame' (I've seen this before).
'shame' with its final letter taken off is 'SHAM'.
(Other definitions for sham that I've seen before include "Unreal" , "False, pretend" , "Bogus hams" , "Counterfeit, fake" , "Mash, being counterfeit" .)