Crossword Genius

Sleeplessness (8)

Ross

I believe the answer is:

insomnia

'sleeplessness' is the definition.
(insomnia is a kind of sleeplessness)

This is all the clue.

(Other definitions for insomnia that I've seen before include "Wakefulness" , "In restless state" , "Sleep disorder" , "Habitual inability to sleep (8)" , "Habitual sleeplessness" .)

I've seen this clue in The Times, the Evening Standard, The Sun and the Sydney Morning Herald.
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