Compulsion (4)
'compulsion' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for urge that I've seen before include "Implore" , "Press to take action" , "Try hard to persuade, advise earnestly" , "Compulsion; egg on" , "Strong desire; impel" .)
'compulsion' is the definition.
(as in doing something under duress)
This is the entire clue.
(Other definitions for duress that I've seen before include "Constraint, force" , "Compulsion by use of force" , "Illegal coercion" , "Pressure (involving threats)" , "The use of force or threats to get one's way" .)