Epithet given to Henry Percy, the rebel knight immortalised in Henry IV, Part One (7)
I believe the answer is:
hotspur
(Other definitions for hotspur that I've seen before include "Violent and rash chap" , "Nickname of Sir Henry Percy (Henry IV, Part one)" , "named in London team?" , "hanger-on at London club?" , "Sir Henry Percy's name" .)