Crossword Genius

Setter's power as mischief-maker (3)

Ross

I believe the answer is:

imp

'mischief-maker' is the definition.
(I've seen this before)

'setter's power' is the wordplay.
'setter's' becomes 'I'm' (referring to the person who set the crossword).
'power' becomes 'p'.
'im'+'p'='IMP'

'as' acts as a link.

(Other definitions for imp that I've seen before include "Small devil or sprite" , "Emperor" , "old-fashioned graft" , "puck" , "pickle" .)

I've seen this clue in the Independent.
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