Painter Paul (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
klee
'painter paul' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for klee that I've seen before include "Paul ---, Swiss artist" , "Auction offerer" , "Paul - - , Swiss painter" , "Paul --, Swiss surrealist" .)