Compel (5)
'compel' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for drive that I've seen before include "Motivation, energy" , "sustained military assault" , "Hit golf ball from tee" , "Diver (anag.)" , "Force into action, impel" .)
'compel' is the definition.
(forcing is a kind of compelling)
This is all the clue.
(Other definitions for force that I've seen before include "fall" , "Muscle" , "Vehemence" , "Violence" , "cascade of water" .)
'compel' is the definition.
(synonyms)
This is all the clue.
(Other definitions for oblige that I've seen before include "Please" , "Put oneself out for" , "Bind morally or legally" , "press!" , "Perform a favour for" .)
'compel' is the definition.
(coercing is a kind of compelling)
This is all the clue.
(Other definitions for coerce that I've seen before include "Force, pressure" , "Railroad" , "Forcibly compel" , "Persuade by threatening" , "Force into obedience" .)
'compel' is the definition.
(enforcing is a kind of compelling)
This is all the clue.
(Other definitions for enforce that I've seen before include "Make (a law) obeyed" , "Impose compliance with (a law)" , "Apply law" , "Compel adherence to (a law)" , "Impose by necessity" .)
'compel' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for constrain that I've seen before include "Lock up" , "Severely restrict" , "Restrict the extent of" , "Check" , "Compel towards a course of action" .)
'compel' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for obligate that I've seen before include "Compel (someone) to do moral/legal duty" , "Force" , "By necessity" .)