Hardly positions of strength (4,5)

I believe the answer is:

weak spots

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'strength' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'hardly positions' is the wordplay.
'hardly' becomes 'weak' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'positions' becomes 'spots' ('spot' can be a synonym of 'position').
'weak'+'spots'='WEAK SPOTS'

'of' is the link.

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

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