Rogue lawyer exaggerates volume of musician's output? (5)

I believe the answer is:

scamp

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'rogue' is the definition.
(I've seen this in another clue)

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

(Other definitions for scamp that I've seen before include "Mischief-maker" , "Impish youngster" , "Mischievous child (colloq.)" , "A young rascal misbehaving in camps" , "Little Devil" .)

I've seen this clue in The Irish Times.

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