Jimmy —, singer-actor who played the title role in 1990s BBC TV drama series Spender (4)
I believe the answer is:
nail
(Other definitions for nail that I've seen before include "Brad or tack" , "Thin pointed fastener" , "Detect or catch (a criminal) (colloq.)" , "Fasten, catch (criminal)" , "one wouldn't want in one's coffin?" .)