Crossword puzzle clue "they may be found in midstream"

ISLET, a small island

to bring forth a foetus prematurely, to cause to come to nothing

CHIP, to break a small piece from

AMOEBA, (Greek) a one-celled animal of ever-changing shape, also AMEBA

ANSWER, to say, write, or act in return

ATHLETE, a competitor in contests of strength and speed, also ATHLETA