Possible Clues:

• Cockney motto expressing dejection
• Sounding wistful
• Groaning
• Expressing weariness
• Soldiers' backs turn, almost bringing audible relief?
• Weary act
• Sounding weary/bored
• Gendarme's introduction is flipping hilarious, primarily in "Good Moaning"!
• Moaning Higgins goes to pot
• Exhaling with yearning