Possible Clues:

• Cranky street performer?
• Monkey's master when playing on the street
• One playing in street or foreman going round outside
• Certain street performer
• Street musician who traditionally was accompanied by a monkey
• Musician who is possible generator of groan
• Street performer of yore
• Street musician
• Some criminals call 24 in order to see 19 21
• Street musician ranging freely needs to be in proper condition