Cowboy's charge
I believe the answer is:
herd
'cowboy's charge' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for herd that I've seen before include "Group of animals of one kind" , "Collection of swine" , "Group of, eg, cows" , "Group of cows, elephants etc" , "Group of people behaving like sheep?" .)