Poor bloke on the fiddle slightly twisted? Get away! (7)
I believe the answer is:
scarper
'get away' is the definition.
(scarper can informally mean to run away)
I don't understand the rest of the clue.
(Other definitions for scarper that I've seen before include "Run away (colloq.)" , "Clear off!" , "Take to one's heels, cut and run" , "bolt" , "Vamoose" .)