Puts out one book from painter (5)

I believe the answer is:

stubs

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'puts out' is the definition.
The definition and answer can be both related to bodily activities as well as being verbs in their -s form.
Perhaps they are linked in a way I don't understand?

'one book from painter' is the wordplay.
'one book' becomes 'b' (abbreviation for book).
'from' indicates named letters should be taken away.
'painter' becomes 'stubbs' (painter George Stubbs).
'stubbs' with 'b' removed is 'STUBS'.

Can you help me to learn more?

(Other definitions for stubs that I've seen before include "residual pieces" , "Butts" .)

I've seen this clue in The Telegraph.

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