Possible Clues:

• One who does not really under­stand the words being imitated
• Repeat what is expected — rubbish
• Repeat incentive to replace Conservative by pressure
• Reproduce the usual rubbish
• Mimic standard drivel
• Usual standard, rubbish mimic
• Echo, ape, repeat
• Polly run over in neighbourhood
• Caged copycat
• Pirate's pet