Possible Clues:

• Half-cut old Ethiop next to a lake that's very deep
• From the deep area near a lake entered by ship
• A little baby's sallow from a very deep bed
• Sailor, Yankee with girl climbing on the bed?
• ____ plains are ocean floors between continental rises and mid-ocean ridges
• A handy girl to call up -- but lacking 'bottom'?
• Bottomless
• Extremely deep
• So deep as to be unmeasurable
• Of ocean depths, bottomless