A compulsive thing to do (6)
I believe the answer is:
compel
'do' is the definition.
The definition and answer can be both to do with social activities as well as being verbs in their base form.
Maybe they are linked in a way I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for compel that I've seen before include "Coerce, force to obey" , "drive on" , "'Force, oblige (6)'" , "Force, oblige to do something" , "Use force or influence to make person do something" .)