Possible Clues:

• Red ___ (young amphibian)
• Is it the 20 across foot that's in the water?
• Direct deposit abbr.
• One of the 15 down to be abandoned after half a century
• Small amphibian first to leave port
• Left at last in the water
• In the water to the east, one foot
• Amphibian went aw ay, lake having vanished
• Newt departed with no lake available
• Newt hurried off, having wiped brow