Coarse man apprehended by a French revolutionary general (9)

'coarse' is the definition.
(thesaurus)

'man apprehended by a french revolutionary general' is the wordplay.
'man' becomes 'gent' (I've seen this before**).
'apprehended by' is a charade indicator (letters next to each other).
'a french' becomes 'un' ('a' in French).
'revolutionary' says the letters should be written in reverse.
'general' becomes 'lee' (Robert E. Lee - US revolutionary commander).
'lee' written backwards gives 'eel'.
'gent' put after 'un' is 'ungent'.
'ungent'+'eel'='UNGENTEEL'