### Clue: Confusing words by mother to child endlessly on plane (5-5)
### Answer: MUMBO JUMBO 
 ### Explanation: Definition: Confusing words
 MUM(familiar term for a mother) **plus**(to) "boy"(a male child) **minus ****its last letter**(endlessly) **placed above**(on, in a down clue) JUMBO(… jet, nickname for a very large airliner/plane, originally the Boeing 747).