Kill lots of black birds (6)
I believe the answer is:
murder
'kill' is the definition.
(murder is a kind of kill)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for murder that I've seen before include "Shoot dead" , "Unlawful premeditated killing" , "Voraciously consume" , "Kill" , "very difficult task" .)