Force put on clothes covering uniform (6)
I believe the answer is:
duress
'force' is the definition.
(duress is a kind of force)
'put on clothes covering uniform' is the wordplay.
'put on clothes' becomes 'dress' (I've seen this before).
'covering' indicates putting letters inside.
'uniform' becomes 'U' (phonetic alphabet: alpha, bravo, charlie etc.).
'dress' enclosing 'u' is 'DURESS'.
(Other definitions for duress that I've seen before include "Use of force or threats to get something" , "Use of force or threats, often vile" , "Constraint, force" , "The use of force or threats to get one's way" , "Threat of coercion" .)