Bill —, actor who played Compo in BBC TV sitcom Last of the Summer Wine (4)
I believe the answer is:
owen
(Other definitions for owen that I've seen before include "Wilfred - - , WWI poet" , "Clive --, English actor" , "Welsh industrialist and social reformer, founder of cooperative communities, d. 1858" , "English war poet, killed 1918" , "Former SDP leader" .)