Will power is needed for drips (6)

I believe the answer is:

drives

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

'drips' is the definition.
The answer and definition can be both to do with motion as well as being verbs in their -s form.
Maybe you can see an association between them that I can't see?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for drives that I've seen before include "Needs must when the devil ..., it's said" , "Controls movement of a vehicle" , "Applies force to propel something" , "Operates a vehicle" , "Drivers kinds of urges" .)

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

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