Kerouac notably a legible writer, says Spooner (7)

I believe the answer is:

beatnik

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'kerouac' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for beatnik that I've seen before include "1950s' bohemian" , "Unconventional young scruff" , "Fifties rebel" , "1950s dropout" , "Kite ban (anag) - 1950s' non-conformist" .)

I've seen this clue in the Sydney Morning Herald.

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