Some seek leeway for Swiss painter (4)
I believe the answer is:
klee
'swiss painter' is the definition.
(Paul Klee, 1879-1940)
'some seek leeway for' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'KLEE' is hidden within 'seek leeway for'.
(Other definitions for klee that I've seen before include "Paul --, Swiss surrealist" , "Auction offerer" , "Paul ---, Swiss artist" , "Paul - - , Swiss painter" .)