Crossword Genius

Fool turning to dot a couple of i's (5)

Ross

I believe the answer is:

idiot

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

'fool' is the definition.
(synonyms)

'turning to dot a couple of i's' is the wordplay.
I cannot really understand how this works, but
'of' could be 'o' and 'o' is present in the answer.
'dot' could be 'dit' (synonyms) and 'dit' is found in the leftover letters.
'i' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for idiot that I've seen before include "Simpleton" , "Dope" , "Ass, nincompoop" , "Foolish person" , "Unwise person" .)

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