Swiss abstractionist (4)
I believe the answer is:
klee
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">swiss abstractionist</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for klee that I've seen before include "Paul - - , Swiss painter" , "Paul ---, Swiss artist" , "Auction offerer" , "Paul --, Swiss surrealist" .)