Forensics centre stops murder - tops! (6)

I believe the answer is:

crowns

I'm a little stuck... Click here to teach me more about this clue!

'tops' is the definition.
('crown' can be a synonym of 'top')

I cannot understand how the remainder of the clue works.

(Other definitions for crowns that I've seen before include "Symbols of monarchy" , "Tops of heads - tops of teeth" , "emblems of kingship" , "At least ten shillings" , "caps" .)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.