Crossword Genius

Work for two that five divide fairly makes such a day for relaxing (5)

Ross

I believe the answer is:

duvet

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

'work for two that five divide fairly makes such a day for relaxing' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'work for two that five divide' is the wordplay.
'work for two' becomes 'duet' (I've seen this before).
'that five' becomes 'V' (Roman numeral).
'divide' means one lot of letters goes inside another (inserted letters divide the word).
'duet' going around 'v' is 'DUVET'.

Can you help me to learn more?

(Other definitions for duvet that I've seen before include "Continental quilt" , "Thick soft quilt instead of bedclothes" , "Bed quilt" , "Eiderdown" , "Bed-cover" .)

I've seen this clue in The Guardian.
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