Dodgy dealer perhaps supplies instrument to comedians (4,5)
I believe the answer is:
card sharp
'dodgy dealer perhaps' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'instrument to comedians' is the wordplay.
'instrument' becomes 'harp' (harp is a kind of instrument).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'comedians' becomes 'cards' (I've seen this in another clue).
'harp' after 'cards' is 'CARD-SHARP'.
'supplies' is the link.
Can you help me to learn more?
(Other definitions for card sharp that I've seen before include "cheat in casino" , "wicked whist whizz?" , "one whose hands are not to be trusted" , "Cheat at poker, say" , "Cheating gambler" .)