More than satisfies (8)

I believe the answer is:

overpays

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'satisfies' is the definition.
Although both the answer and definition are verbs in their -s form, I don't see how one could define the other.

'more than' is the wordplay.
'more' becomes 'over' (I've seen this before).
'than' becomes 'pays' (I am not sure about this - if you are sure you should believe this answer much more).
'over'+'pays'='OVERPAYS'

Can you help me to learn more?

(Other definitions for overpays that I've seen before include "Rewards too highly" , "Lays out more money than something's worth" .)

I've seen this clue in the Evening Standard.

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