Possible Clues:

• It helps detect when a murder's involved
• Part of hearing, not all, heard rumour
• Rude ram (anag.)
• It'll help you hear the show
• Does it get soundly beaten?
• Ear membrane
• Otic membrane
• A red mixed with spirit -- it pulsates in one's head
• The listener’s part in a murder resolved
• Facial hair (not black) on strange part of body