Crossword Genius

He has impact in children's entertainment (5)

Ross

I believe the answer is:

punch

I'm a little stuck... Click here to teach me more about this clue!

'entertainment' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'he has impact in children's' is the wordplay.
I cannot quite understand how this works, but
'children' could be 'ch' (genealogical abbreviation) and 'ch' is found within the answer.
The remaining letters 'pun' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for punch that I've seen before include "Strike; former magazine" , "Poke" , "that would be attached to haywain for pulling?" , "horse to get > drink" , "Act violently" .)

I've seen this clue in the Evening Standard.
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