Pop Edwin mixed to reduce noise (4,4)

I believe the answer is:

pipe down

I'm a little stuck... Click here to teach me more about this clue!

'reduce noise' is the definition.
I can't judge whether this definition defines the answer.

'pop edwin mixed' is the wordplay.
'mixed' indicates an anagram.
'pop'+'edwin'='popedwin'
'popedwin' is an anagram of 'PIPE DOWN'.

'to' acts as a link.

Can you help me to learn more?

(Other definitions for pipe down that I've seen before include "make less noise" , "Shut up!" , "Say no more!" , "Be quiet!" , "Sh!" .)

I've seen this clue in The Sun.

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