The facts and figures - a tad revolting (4)
I believe the answer is:
data
'the facts and figures' is the definition.
(I've seen this before)
'a tad revolting' is the wordplay.
'revolting' says the letters should be written backwards.
'a'+'tad'='atad'
'atad' backwards is 'DATA'.
(Other definitions for data that I've seen before include "computer input?" , "intelligence" , "Information for/from computer" , "Collection of bits of information" , "Evidence" .)