Crossword Genius

King's instrument for fiddler? (4,5)

Ross

I believe the answer is:

card sharp

'fiddler?' is the definition.
(type of fraud or fiddler)

'king's instrument' is the wordplay.
'king's' becomes 'card's' (king is a type of playing card).
'instrument' becomes 'harp' (harp is a kind of instrument).
'cards'+'harp'='CARD-SHARP'

'for' acts as a link.

(Other definitions for card sharp that I've seen before include "Cheating gambler" , "cheat in casino" , "Trickster" , "You won't get a good deal out of one" , "one whose hands are not to be trusted" .)

I've seen this clue in The Guardian.
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