Crossword Genius

Wears when one goes to bed and gets up late (6,2)

Ross

I believe the answer is:

sleeps in

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

'wears' is the definition.
The definition and answer can be both related to bodily activities as well as being verbs in their -s form.
Perhaps there's a link between them I don't understand?

'one goes to bed and gets up late' is the wordplay.
I cannot really understand how this works, but
'one' could be 'i' (Roman numeral) and 'i' is located in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is located in the answer.
The remaining letters 'sleeps' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'when' is the link.

Can you help me to learn more?

(Another definition for sleeps in that I've seen is " ignores alarm?".)

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