Synonymous with right? Could be (5)

I believe the answer is:

might

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'could be' is the definition.
'might' can be an answer for 'could' (synonyms). I am not certain of the 'be' bit.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for might that I've seen before include "Clout" , "Great power/strength" , "Capability" , "word expressing possibility" , "It expresses possibility" .)

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

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