The term Yowie is a cryptid, or mythical creature, from Australian Aboriginal folklore. It is described as a large, hairy, ape-like creature that is said to inhabit the wilderness of Australia. The crossword solution for Yowie is 'OUCH', which is an expression of pain or discomfort. This is likely a reference to the fact that Yowie is said to be a fearsome creature that can cause harm to those who encounter it.