Eggs on violent activists to begin with (3)
I believe the answer is:
ova
'eggs' is the definition.
(term for egg cells)
'on violent activists to begin with' is the wordplay.
'to begin with' says to take the initial letters.
The first letters of 'on violent activists' is 'OVA'.
(Other definitions for ova that I've seen before include "Fertility clinic stock!" , "Prerequisite for procreation" , "Female gametes" , "Potential life sources" , "Female reproductive cells" .)