Audibly perceived some cows (4)
I believe the answer is:
herd
'some cows' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'audibly perceived' is the wordplay.
'audibly' shows a homophone (sound like).
'perceived' becomes 'heard' (hearing is a kind of perceiving).
'heard' sounds like 'HERD'.
Can you help me to learn more?
(Other definitions for herd that I've seen before include "Crowd of cattle" , "Drive" , "Group of cows, elephants etc" , "The rabble" , "Flock" .)