Clothing pioneer Strauss (4)
I believe the answer is:
levi
'clothing pioneer strauss' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for levi that I've seen before include "The Strauss who first patented blue jeans" , "Hebrew patriarch, son of Jacob" , "Hebrew patriarch - Italian writer" , "Primo -, It. novelist" , "Primo --, Italian writer and chemist" .)