Related Clues:

• Insect — nasty character, undeserving of respect
• Leonardo's outside to exploit rotter
• Gadget that makes space less polluted?
• Target of permethrin cream
• Look to exploit wretch
• Local unpleasant person running Seoul
• Leftover unpalatable Scotch egg, primarily indicating a bad egg
• See something worthwhile in blackguard
• Sucky appliance
• Medical device which removes fluid from a bodily cavity
• Nothing is cleaner!
• Look to lead exercise to find parasite
• Scalp bug
• Insect in shirt, initially unseen
• Clean up dust and pet hair, maybe