Fixed form of denial (6)

I believe the answer is:

nailed

'fixed' is the definition.
(I've seen this before)

'form of denial' is the wordplay.
'form of' indicates anagramming the letters (another form of the same letters).
'denial' anagrammed gives 'NAILED'.

(Other definitions for nailed that I've seen before include "Fastened with spike" , "Firmly fixed" , "Properly fixed" , "Accomplished" , "Fastened with metal pin" .)

I've seen this clue in The Globe and Mail and The Guardian.

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