Monkey regarding, say, Van Gogh's technique (7)

I believe the answer is:

impasto

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'technique' is the definition.
(painting technique)

'monkey regarding' is the wordplay.
'monkey' becomes 'imp' (synonyms).
'regarding' becomes 'as to' (I've seen this in another clue).
'imp'+'asto'='IMPASTO'

'say van gogh's' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for impasto that I've seen before include "Sort of paint" , "Thickly-applied paint" , "Technique of paint applied thickly" , "Thickly-applied painting technique" , "Thick coat required" .)

I've seen this clue in The Telegraph.

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