Anger gripping almost all in French train (9)
I believe the answer is:
entourage
'train' is the definition.
(a train of people)
'anger gripping almost all in french' is the wordplay.
'anger' becomes 'enrage' (to enrage is to anger).
'gripping' indicates putting letters inside (inserted letters are gripped).
'almost' means to remove the last letter (almost the whole word is kept).
'all in french' becomes 'tous' (I've seen this in another clue).
'tous' with its final letter taken away is 'tou'.
'enrage' going around 'tou' is 'ENTOURAGE'.
(Other definitions for entourage that I've seen before include "company" , "Group of attendants" , "Supportive group" , "The people accompanying a VIP" , "train" .)