Can be mistaken for tickets (6)
I believe the answer is:
passes
'tickets' is the definition.
(pass is a kind of ticket)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for passes that I've seen before include "Routes through mountains" , "goes beyond" , "'Men seldom make . . . at girls who wear glasses'" , "Achieves the required standard in a test" , "never fails to get?" .)