Related Clues:

• During which heads are almost sure to roll?
• Turnover made by fair-weather sailor, say
• Tumbler's needed for this cocktail of rum, sloes, and a dash of tonic
• During which one is almost sure to be turned over?
• Acrobatic feat in what sounds like two seasons
• Gymnastic feat in heyday heard by experienced sailor on radio
• Gymnast's roll
• Acrobatic flip
• Move acrobatically, hearing of a certain attack
• Move all around
• Diver's rotation
• Low turnover?