A refusal to reply is not the solution (2,6)

I believe the answer is:

no answer

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'a refusal to reply' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'not the solution' is the wordplay.
'not' becomes 'no' (I've seen this in other clues).
'the solution' becomes 'answer' ('answer' can be a synonym of 'solution').
'no'+'answer'='NO ANSWER'

'is' is the link.

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