Refusal reviewed in deal (6)
I believe the answer is:
denial
'refusal' is the definition.
(I've seen this before)
'reviewed in deal' is the wordplay.
'reviewed' is an anagram indicator (letters reviewed or revised).
'in'+'deal'='indeal'
'indeal' anagrammed gives 'DENIAL'.
(Other definitions for denial that I've seen before include "Rejection or refusal" , "Saying it isn't so" , "Daniel (anag.)" , "Nailed (anag.)" , "Rejection of a request" .)