Related Clues:
- It's used to prevent entry of noise or water
- Ironically, this may cause sound to wane for you (6)
- Quiet among listeners? This could help achieve it
- It enabled Wyatt to hear - or not!
- Muffler quietly placed between auditory orifices
- Stopper formed from middle of huge pearl
- Organ swell may affect one's hearing
- It could make you imperfectly aware and cross
- Old US lawman has to carry silencer
- Expert airmen, primarily 'right stuff' for sound barrier
- Protection against noise
- Otic deposit
- Secretion impairing hearing
- Secretion that can impair hearing
- Personal defence against noise (or water)