Possible Clues:

• The little sucker is in time, by the sound of it
• Check-mark or blood-sucking mite
• Sound of old clock
• Case of a mattress
• The parasite sounds as if it's in time.
• Moment that can worry sheep and cattle
• Just watch, by the sound of it, what a bloodsucker one is
• Bloodsucking arachnid
• Mite's cousin
• Blood-sucking mite or parasitic insect