busk 
(b
ŭsk)
intr.v. busked,
busk·ing,
busks To play music or perform entertainment in a public place, usually while soliciting money.
[Earlier, to be an itinerant performer, probably from busk, to go about seeking, cruise as a pirate, perhaps from obsolete French busquer, to prowl, from Italian buscare, to prowl, or Spanish buscar, to seek, from Old Spanish boscar.]
busker n.