Design using cutting included in sketchbook (4)

I believe the answer is:

etch

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'design using cutting included' is the definition.
I can't judge whether this defines the answer.

'in sketchbook' is the wordplay.
'in' says the answer is hidden in the clue.
'ETCH' can be found hidden inside 'sketchbook'.

Can you help me to learn more?

(Other definitions for etch that I've seen before include "Carve or engrave into surface" , "Engrave deeply" , "Engrave metal plate using acid" , "Engrave (glass/metal)" , "Wear away by chemical reaction" .)

I've seen this clue in The Times.

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