Related Clues:

• Parasitic insect or pillow casing
• Make sound like old clock
• A blood-sucking mite or insect
• A blood-sucking mite
• Sound of an old watch
• The sound of a clock in the mattress?
• The parasite sounds as if it's in time.
• Watch the time, by the sound of it
• How the watch is going to get off with a reprimand
• Sounds as if it's in time
• The little sucker is in time, by the sound of it
• Sounds as if the sucker is in time
• Not for 11 across, by the sound of it
• Just watch, by the sound of it, what a bloodsucker one is
• The clock makes this a parasite