Crossword Genius

Expert makes a witty remark (5)

Ross

I believe the answer is:

crack

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

This could be a double definition.

'expert' is the first definition.
(as in 'a crack team')

'a witty remark' is the second definition.
'crack' can be an answer for 'remark' (crack is a kind of remark). I'm unsure of the 'a witty' bit.

'makes' acts as a link.

Can you help me to learn more?

(Other definitions for crack that I've seen before include "First-rate" , "Opening; sharp blow" , "Go for expert" , "Narrow opening; joke" , "Fracture" .)

I've seen this clue in the Evening Standard.
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