Crossword Genius

Prophet turned in bed from dizziness (7)

Ross

I believe the answer is:

scotoma

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

'dizziness' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?

'prophet turned in bed' is the wordplay.
I cannot really understand how this works, but
'bed' could be 'cot' (cot is a kind of bed) and 'cot' is located in the answer.
The remaining letters 'soma' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'from' is the link.

Can you help me to learn more?

(Another definition for scotoma that I've seen is " Blind spot".)

I've seen this clue in the Sydney Morning Herald.
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