I’ve reached P for “painting technique” (7)
I believe the answer is:
impasto
'painting technique' is the definition.
(I know that impasto is a painting technique)
'i've reached p for' is the wordplay.
I cannot really see how this works, but
'p' is within the answer.
'for' could be 'to' (eg both can mean 'in the opinion of') and 'to' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for impasto that I've seen before include "Good covering of paint" , "Thickly-applied painting technique" , "Thick coat required" , "Thick-paint technique" , "Method of painting" .)