Possible Clues:

• Young hares
• There's very little hair there, by the sound of them
• 'Very little hair, by the sound of it (8)'
• Young creatures always invading rented properties
• Young animals always restricted by permits
• Young bounders in form
• Shall we be around always with so little hair, by the sound of it? (8)
• Set elver among young hares
• Let verse be about small creatures
• Let verse envisage young hares