Prison visitor's not a Charlie (7)

I believe the answer is:

chaplin

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'charlie' is the definition.
(Charlie Chaplin)

I don't understand how the remainder of the clue works.

(Other definitions for chaplin that I've seen before include "Charlie --, film comic" , "Charlie . . . . . . ., great clown of the cinema" , "Comedian who wore baggy pants and bowler hat" , "Charlie -- (The Gold Rush)" , "Charlie --, silent film star" .)

I've seen this clue in The Guardian.

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