Answer: billabong

AnswerCrossword Clue
BILLABONGAborigine word for a creek that runs during the rainy season only
BILLABONGBlind channel leading out from a river in Australia.
BILLABONGBackwater, in Australia
billabong(Aborig.) a cut-off loop of a river, replenished only by floods
billabongA branch of a river forming a backwater or stagnant pool, made by water flowing from the main stream during a flood