Entertainer who might generate a sudden impact? No (5-2,8)

I believe the answer is:

stand-up comedian

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

'entertainer' is the definition.
(I know that stand-up comedian is a type of comedian)

'generate a sudden impact? no' is the wordplay.
'generate' indicates an anagram (I've seen 'generated' mean this).
'a'+'sudden'+'impact'+'no'='asuddenimpactno'
'asuddenimpactno' with letters rearranged gives 'STAND-UP COMEDIAN'.

'who might' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?

I've seen this clue in The Times.

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