Hotspur is a term used to describe a person who is impulsive and eager to take action. It is derived from the character of the same name in William Shakespeare's play Henry IV, Part 1. Hotspur was a brave and daring knight who was always ready to fight for what he believed in. The crossword solution 'PERSECUTOR' is an apt description of Hotspur, as he was willing to go to any lengths to pursue his goals.