Company lashed out in anger (9)
I believe the answer is:
entourage
'company' is the definition.
(I've seen this before)
'lashed out in anger' is the wordplay.
'lashed' indicates anagramming the letters.
'in' is an insertion indicator.
'anger' becomes 'enrage' (enraging is a kind of angering).
'out' with letters rearranged gives 'tou'.
'tou' placed inside 'enrage' is 'ENTOURAGE'.
(Other definitions for entourage that I've seen before include "A star may have one" , "train" , "Support team" , "The people accompanying a VIP" , "Ego nature found in accompanying group" .)