Contest of pure pugnacity, precisely (6)

I believe the answer is:

repugn

'contest' is the definition.
('repugn' can be a synonym of 'contest')

'of pure pugnacity precisely' is the wordplay.
'of' says the answer is hidden in the clue.
'REPUGN' can be found hidden inside 'pure pugnacity precisely'.

(Another definition for repugn that I've seen is " Once be unwilling".)

I've seen this clue in The Telegraph.

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