Did Punch end, unexpectedly, with prominent feature? (7)

I believe the answer is:

chinned

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'did punch' is the definition.
Although both the answer and definition are past participle verbs, I don't see how one could define the other.

'end unexpectedly with prominent feature?' is the wordplay.
'unexpectedly' is an anagram indicator.
'with' is an insertion indicator.
'prominent feature?' becomes 'chin' (I've seen this before).
'end' is an anagram of 'ned'.
'ned' enclosing 'chin' is 'CHINNED'.

Can you help me to learn more?

I've seen this clue in The Times.

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