Marxist lark perhaps (4)

I believe the answer is:

karl

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

'lark perhaps' is the wordplay.
'perhaps' indicates anagramming the letters.
'lark' is an anagram of 'KARL'.

Can you help me to learn more?

(Other definitions for karl that I've seen before include "Founder of communism, . . . . Heinrich Marx" , "-- Marx, socialist" .)

I've seen this clue in The Globe and Mail.

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