Crossword Genius

Reason why Minoan is astir? (8)

Ross

I believe the answer is:

insomnia

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

'reason why' is the definition.
The answer and definition can be both states of affairs as well as being singular nouns.
Maybe you can see a link between them that I can't see?

'minoan is astir?' is the wordplay.
'minoan is' anagrams to 'INSOMNIA'.
But, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for insomnia that I've seen before include "Not getting off" , "Habitual inability to sleep (8)" , "Habitual sleeplessness" , "problem at night" , "Inability to drop off" .)

I've seen this clue in The Sun.
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