Shows willing (4)

I believe the answer is:

nods

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'shows' is the definition.
The definition and answer can be both acts as well as being plural nouns.
Maybe there's a link between them I don't understand?

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for nods that I've seen before include "Is careless" , "Inclines head" , "Makes mistake" , "is about to crash?" , "Indicates assent" .)

I've seen this clue in the Evening Standard.

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