Possible Clues:

• Relaxation of French taking 5 escargots, primarily
• Lessening of tension inside ten territories
• Leaders in dispute eager to eliminate needless tension engaged in this?
• A letter about holiday accommodation should ease tension
• It gets pitched into the river to make the trouble less
• Easing of strained relationships between countries
• Prelude to peace, perhaps
• Thaw in relations revealed by woman swigging wine
• Negotiation result
• 1970's policy