"Casablanca” star, familiarly (5)
I believe the answer is:
bogie
'casablanca star familiarly' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bogie that I've seen before include "Pivoted group of four or six wheels on an engine" , "Set of railcoach wheels" , "Rail wheel assembly" , "Wheeled undercarriage that supports a rail car" , "Part of carriage" .)