Possible Clues:

• Areas of calm at sea mear the Equator
• You'll never get the wind from such five-century-old drinks
• Ocean regions where there is little or no wind
• The —, a state of stagnation
• Party line beats low spirits
• Stagnant state
• Detective Sergeant apprehending former suspect in low spirits
• Popular term for the Intertropical Convergence Zone
• Dumps 500 crude containers, after dumping one
• Equatorial region of Atlantic Ocean