The rest may be due to Wayne (5)

I believe the answer is:

sleep

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'the rest' is the definition.
('sleep' can be a synonym of 'rest')

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for sleep that I've seen before include "Snooze" , "''... that knits up the ravell'd sleeve of care'' (Macbeth)" , "Be dormant" , "Natural state of unconscious rest" , "Slumber" .)

I've seen this clue in the Evening Standard.

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