Related Clues:

• Soften in a microwave
• Détente
• What changed melting of ice caps, eg?
• Warm cloth: awesome clothes
• John --, actor who played Chief Inspector Morse
• Roughly what to do to relax?
• (Of snow or ice) melt
• Move from freezer to counter
• What could be an improvement in the weather
• Lessening of hostilities
• Initially tense, hesitant and wary, become more relaxed
• Warm spell that causes melting
• Become less frozen
• Extended defrosting
• Undergo rapprochement