Possible Clues:

• Get straight out of a French dance from the sixties
• Loosen, as a bottle cap
• Straighten out a foreign scene with an expected ending
• Straighten out a French Oliver
• Straighten out a foreign scene with an unexpected ending
• Straighten out a foreign scene with unexpected ending
• Remove, as a bottle cap
• Take off, as a soda cap
• Tackle a cap
• Nancy's a fool, grasping double hook to straighten