Answer:

tadpole

Answer	Crossword Clue
TADPOLE	Lily-pond larva
TADPOLE	Larval amphibian
TADPOLE	Amphibian with gills

TADPOLE	Future frog
TADPOLE	Future jumper
TADPOLE	Kermit as a youngster, presumably
TADPOLE	One who'll croak in the future
TADPOLE	Small frog in a big pond?
TADPOLE	Stage in a frog's life
TADPOLE	Pond juvenile
TADPOLE	Pond swimmer

TADPOLE	Pond infant
TADPOLE	Larva with gills
TADPOLE	Newborn frog
TADPOLE	Young toad
TADPOLE	Infant frog
TADPOLE	Frog larva
TADPOLE	Swimmer in the spring.
TADPOLE	Future frog.

TADPOLE	Larva of an amphibian.
TADPOLE	Immature amphibian.
TADPOLE	Long-tailed larva.
TADPOLE	Larval amphibian.
TADPOLE	Amphibian.
TADPOLE	Frog-to-be.
TADPOLE	Swimming larva.
TADPOLE	Would-be frog.

TADPOLE	Pond creature
TADPOLE	Pond denizen.
TADPOLE	Polliwog
TADPOLE	Frog-to-be
TADPOLE	Kermit as a kid
TADPOLE	Kermit, once?
TADPOLE	Young Kermit to plead insane (7)
TADPOLE	Pond denizen

TADPOLE	Creature that loses its tail
TADPOLE	Immature swimmer
TADPOLE	One on the verge of croaking?
TADPOLE	Kermit as a youth
TADPOLE	He'll croak eventually