Old-fashioned hearing aid (3,7)
I believe the answer is:
ear trumpet
'old-fashioned hearing aid' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ear trumpet that I've seen before include "Hearing piece" , "Primitive hearing aid" , "eight [HEARING AID]" , "help in reception" , "sound engineering device" .)