Restrain men later agitated about Frenchman (9)
I believe the answer is:
entrammel
'restrain' is the definition.
(thesaurus)
'men later agitated about frenchman' is the wordplay.
'agitated' indicates anagramming the letters.
'about' indicates putting letters inside.
'frenchman' becomes 'm' (abbreviation for Monsieur - like 'Mr').
'men'+'later'='menlater'
'menlater' with letters rearranged gives 'entramel'.
'entramel' going around 'm' is 'ENTRAMMEL'.
(Other definitions for entrammel that I've seen before include "Restrain" , "Prevent movement" , "Ravel" , "Hamper" .)