Related Clues:
- Buzzer beater?
- Start or end for a fly?
- Nontoxic insecticide?
- Gnat's undoing
- Trap wasp -- oddly, rotating fly-killer could do this
- Big smack
- Smack, as a mosquito
- Hit with a newspaper, say
- Caps on a protective vest
- Hit a wasp or fly
- Attack on a fly
- Smack real good
- Knock out of the air, perhaps
- Smack, as a housefly
- Deal a crushing blow to?