Related Clues:

• Critic
• One who hoots
• Brooklyn trailer hauler?
• Heckler
• Boo-bird, e.g.
• The editor, no friend of yours, may turn up on 19 across
• Critic of French farm machinery
• One disparages or belittles
• Man up on farm vehicle, one responsible for mud flying around
• One coming out with 'Rotter! Cad!'?
• One belittling rubbish, taken the wrong way
• No heart to drive vehicle - he runs people down
• One who is critical
• Having emptied drivable vehicle one runs people down
• Fan that's unhappy