Break up crowd (5)
I believe the answer is:
crush
I believe this is a double definition.
'break up' is the first definition.
(crushing is a kind of breaking up)
'crowd' is the second definition.
(crush is a kind of crowd)
(Other definitions for crush that I've seen before include "An infatuation with the orange drink?" , "Fruit drink; crowd" , "Suppress - infatuation" , "Passion - fruit drink?" , "Squash" .)