Killer's headless chickens? (6)
I believe the answer is:
layers
'chickens?' is the definition.
The definition and answer can be both animals as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'killer's headless' is the wordplay.
'killer's' becomes 'slayers' ('slayer' can be a synonym of 'killer').
'headless' means to remove the first letter.
'slayers' with its first letter removed is 'LAYERS'.
Can you help me to learn more?
(Other definitions for layers that I've seen before include "Thicknesses of material - or hens?" , "Coverings" , "egg producers" , "courses" , "Those preparing" .)