___ Hurcum, the world's first openly nonbinary mayor (4)
I believe the answer is:
owen
(Other definitions for owen that I've seen before include "Clive --, English actor" , "Former SDP leader" , "'E won over the Welshman" , "Welsh industrialist and social reformer, founder of cooperative communities, d. 1858" , "Wilfred -, English poet killed in World War One" .)