Leave university with a revolutionary painting technique (7)
I believe the answer is:
gouache
'painting technique' is the definition.
(I've seen this before)
'leave university with a revolutionary' is the wordplay.
'leave' becomes 'go'.
'university with' becomes 'u' (I can't explain this - if you can you should give a lot more credence to this answer).
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'go'+'u'+'a'+'che'='GOUACHE'
Can you help me to learn more?
(Other definitions for gouache that I've seen before include "Painting technique also called body colour" , "Painting with colours mixed with gum" , "Method of painting" , "Watercolour painting with opaque colours" , "Opaque watercolour paint" .)