Someone who chars for an entertainer (6)

I believe the answer is:

singer

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'an entertainer' is the definition.
(singer is a kind of entertainer)

I can't explain the rest of the clue.

(Other definitions for singer that I've seen before include "Crooner" , "Eg, soprano" , "Member of a choir" , "Make of sewing machine" , "Eg, tenor" .)

I've seen this clue in the Evening Standard.

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