Bank person hides family car for tripper (9)
I believe the answer is:
'bank person' is the definition.
'traveller' can be an answer for 'person' (traveller is a kind of person). I'm not sure about the 'bank' bit.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for traveller that I've seen before include "Voyager" , "One on a trip" , "description of Stevenson or his donkey?" , "becoming less narrow-minded over time?" , "Wayfarer" .)