Crossword Genius

Six balls might knock them for six (9)

Ross

I believe the answer is:

overpower

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

'knock them for six' is the definition.
I can't tell whether this definition defines the answer.

'six balls might' is the wordplay.
'six balls' becomes 'over' (cricket).
'might' becomes 'power' (being mighty).
'over'+'power'='OVERPOWER'

Can you help me to learn more?

(Other definitions for overpower that I've seen before include "Crush" , "Conquer" , "Subjugate" , "Get the better of" , "Subdue, vanquish" .)

I've seen this clue in the Sydney Morning Herald.
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