Castrate violently without using a spray (7)
I believe the answer is:
scatter
'a spray' is the definition.
(thesaurus)
I don't understand the rest of the clue.
(Other definitions for scatter that I've seen before include "Separate and move off in different directions" , "Throw loosely about" , "Strew over an area" , "Disperse, strew" , "Dissipate" .)