Draw somewhat sketchily (4)

I believe the answer is:

etch

'draw' is the definition.
(I've seen this before)

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

(Other definitions for etch that I've seen before include "Cut into a block used for printing" , "Use acid to design on metal or glass" , "Cut using sharp instrument" , "Delineate" , "Make deep lines" .)

I've seen this clue in the Evening Standard.

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