It might indicate a possibility of cloud perhaps (5)

I believe the answer is:

could

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'it might indicate a possibility' is the definition.
The definition suggests a singular noun but the answer is not.

'cloud perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'cloud' is an anagram of 'COULD'.

'of' acts as a link.

Can you help me to learn more?

(Another definition for could that I've seen is " Was able to (do something)".)

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

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