Force to show initiative (5)
I believe the answer is:
Here is my best explanation:
This clue is a double definition.
'force' is the first definition.
(driving is a kind of forcing)
'initiative' is the second definition.
'to show' is the link.
(Other definitions for drive that I've seen before include "Trip in car - road to house", "Private road; impel", "Motivation, energy", "Go by car", "House approach", "Hit ball with force", "Diver (anag.)", "Energy - herd - private road", "Energy and persistence - in car?" and "Impetus; take car".)