Yellow part of sofa in the art edifies (5-7)

I believe the answer is:

faint-hearted

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'yellow part' is the definition.
The definition suggests an adjective which matches the answer.

'of sofa in the art edifies' is the wordplay.
'of' indicates the answer is hidden within the clue.
'FAINT-HEARTED' is hidden within 'sofa in the art edifies'.

Can you help me to learn more?

(Other definitions for faint-hearted that I've seen before include "chicken" , "Timid" , "Timorous - find a theatre (anag)" .)

I've seen this clue in The Times.

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