Forks out for old power points (7)

I believe the answer is:

expends

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'forks out' is the definition.
Although both the answer and definition are verbs in their -s form, I can't see how they can define each other.

'old power points' is the wordplay.
'old' becomes 'ex' (prefix meaning former or onetime).
'power' becomes 'p' (symbol in physics).
'points' becomes 'ends' (end is a kind of point).
'ex'+'p'+'ends'='EXPENDS'

'for' is the link.

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I've seen this clue in The Irish Times.

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