Sounded or rather sound like an animal (5)
I believe the answer is:
neigh
'sound like an animal' is the definition.
'neigh' can be an answer for 'sound' (I have seen 'Sound of horse' mean 'neigh' so perhaps 'sound' could also mean 'neigh'). I am unsure of the 'like an animal' bit.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for neigh that I've seen before include "Whicker" , "High-pitched cry of a horse" , "heard on the farm" , "Negative sound of horse?" , "Horse's noise" .)