Eastenders pick up percussion through it (7)
I believe the answer is:
eardrum
'it' is the definition.
The definition suggests a singular noun which matches the answer.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for eardrum that I've seen before include "One hears" , "It vibrates to sound" , "Aural membrane" , "Organ membrane" , "Hearing membrane" .)