Compiler is busy tonight also (11)

I believe the answer is:

anthologist

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'compiler' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'busy tonight also' is the wordplay.
'busy' indicates anagramming the letters.
'tonight'+'also'='tonightalso'
'tonightalso' anagrammed gives 'ANTHOLOGIST'.

'is' is the link.

Can you help me to learn more?

(Another definition for anthologist that I've seen is " He collects a lot".)

I've seen this clue in The Independent.

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