Caught in a stupid denial (6)
I believe the answer is:
nailed
'caught' is the definition.
(I've seen this before)
'a stupid denial' is the wordplay.
'a stupid' is an anagram indicator (in a stupid order).
'denial' with letters rearranged gives 'NAILED'.
'in' is the link.
(Other definitions for nailed that I've seen before include "Hit precisely" , "Exposed" , "Fastened with metal pin" , "Accomplished" , "Attached by means of a pointed piece of metal" .)