Clothing changed while driving (4)
I believe the answer is:
gear
'clothing' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for gear that I've seen before include "Toothed wheel and youthful fashion" , "Toothed wheel that interlocks with another" , "often changed when driving" , "Informal clothes seen in rage" , "Toothed wheel, equipment and clothes" .)