A HERO's welcome is a warm reception given to someone who has achieved something great or heroic. It is usually expressed through applause, cheers, and other forms of celebration. The crossword solution for the term 'HERO's welcome' is 'OVATION', which is defined as a loud and enthusiastic expression of approval or admiration. An OVATION is typically given to someone who has done something extraordinary or heroic, and is often accompanied by a standing OVATION.