Listener to advertise some protection (7)

I believe the answer is:

earplug

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'some protection' is the definition.
The definition suggests a singular noun which matches the answer.

'listener to advertise' is the wordplay.
'listener' becomes 'ear' (body part which hears or listens).
'to advertise' becomes 'plug' (plugging is a kind of advertizing).
'ear'+'plug'='EARPLUG'

Can you help me to learn more?

(Other definitions for earplug that I've seen before include "Protection from sound" , "Lug blocker" , "Noise reducer" , "Lug stopper?" , "Noise protector" .)

I've seen this clue in The Daily Express.

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