Always heroic? Certainly not! (2,4)

I believe the answer is:

no fear

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'certainly not' is the definition.
(phrase used to express a denial or refusal)

I don't understand how the rest of the clue works.

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(Other definitions for no fear that I've seen before include "what the bold show" , "Certainly not (informal)" , "Absolutely not" , "Definitely not (informal)" , "What brave man displays" .)

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

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