Leaders don't do so, you understand (6)
I believe the answer is:
follow
'understand' is the definition.
(I know that follow is a more specific form of the action the understand)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for follow that I've seen before include "Come next" , "Go along (a route)" , "Go behind" , "Grasp" , "Succeed; go after" .)