Brute’s cry of excitement (5)
I believe the answer is:
yahoo
I believe this is a double definition.
'brute's' is the first definition.
(I've seen this before)
'cry of excitement' is the second definition.
(Other definitions for yahoo that I've seen before include "Race of brutes in Gulliver's Travels" , "Rude or brutish person" , "Brute; hurrah" , "[WHOOPEE] !" , "Uncouth person" .)