Nuisance we hear replacing this window part (4)

I believe the answer is:

pane

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'replacing this window part' is the definition.
'pane' can be an answer for 'window' (thesaurus). I am not sure about the rest of the definition.

'nuisance we hear' is the wordplay.
'nuisance' becomes 'pain' (synonyms).
'we hear' shows a homophone (sound like).
'pain' sounds like 'PANE'.

Can you help me to learn more?

(Other definitions for pane that I've seen before include "Piece of glass in window" , "Single sheet of glass in a window" , "Panel of glass" .)

I've seen this clue in The Sun.

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