Doubtful point in suing such a clever type (6)

I believe the answer is:

genius

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'type' is the definition.
(thesaurus)

'doubtful point in suing such a clever' is the wordplay.
'doubtful point' becomes 'e' (compass point. I am not sure about the 'doubtful' bit.).
'in' is an insertion indicator.
'such a clever' is an anagram indicator.
'suing' is an anagram of 'gnius'.
'e' inserted inside 'gnius' is 'GENIUS'.

Can you help me to learn more?

(Other definitions for genius that I've seen before include "Virtuoso" , "Brilliant person" , "Maestro" , "Great mind" , "Prodigy" .)

I've seen this clue in The Globe and Mail.

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