Possible Clues:

• Lie
• Untruth
• Lie has fooled Dicky
• Treacherous outlaw in fiction
• Seems it's not the real robin lying here
• Lying there it's not really Robin, following the sound of 11 across
• Lie when expressing surprise, say, about educational establishment getting in meat
• Not the genuine Robin? That's a bit of a relief
• Pork pie supplied by poet with quarters on river
• It's not the real Robin lying there