Marxist lark, possibly? (4)
I believe the answer is:
karl
'marxist' is the definition.
Both the definition and answer are singular nouns.
Maybe there's a link between them I don't understand?
'lark possibly?' is the wordplay.
'possibly?' indicates anagramming the letters (I've seen 'possibly' mean this).
'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" .)