Drive to lose footing (4)
I believe the answer is:
trip
'drive' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for trip that I've seen before include "Short excursion" , "Hallucinatory experience" , "Run with light steps" , "Journey, excursion" , "Tour; slip" .)