Scream expression of disgust following the French (5)
I believe the answer is:
laugh
'scream' is the definition.
(thesaurus)
'expression of disgust following the french' is the wordplay.
'expression of disgust' becomes 'ugh' (I've seen this before).
'following' is a charade indicator (letters next to each other).
'the french' becomes 'la'.
'ugh' put after 'la' is 'LAUGH'.
(Other definitions for laugh that I've seen before include "Express joy or mirth" , "scream?" , "Chortle" , "Possible response to joke" , "Good fun" .)