Crossword Genius

The worn part of the window? (4)

Ross

I believe the answer is:

sash

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

'the window?' is the definition.
(I've seen this before)

'the worn part' is the wordplay.
'the worn' becomes 's' (I can't justify this - if you can you should give a lot more credence to this answer).
'part' becomes 'ash' (I have seen 'Part of forest' mean 'ash' so perhaps 'part' could also mean 'ash').
's'+'ash'='SASH'

'of' is the link.

Can you help me to learn more?

(Other definitions for sash that I've seen before include "Ribbon as a symbol of rank" , "Frame for a windowpane" , "(Uniform) strip; window-frame" , "Piece of cloth round waist or shoulder" , "Broad band, the one me father wore?" .)

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