Fox and domestic fowl, headless farm animals (4)
I believe the answer is:
oxen
'farm animals' is the definition.
'oxen' can be an answer for 'animals' (I've seen this before). I am not certain of the 'farm' bit.
'fox and domestic fowl headless' is the wordplay.
'fox' becomes 'ox' (I am not sure about this - if you are sure you should believe this answer much more).
'and' means one lot of letters go next to another.
'domestic fowl' becomes 'hen' (hen is a kind of domestic fowl).
'headless' means to remove the first letter.
'hen' with its initial letter removed is 'en'.
'ox'+'en'='OXEN'
Can you help me to learn more?
(Other definitions for oxen that I've seen before include "Beef stock" , "Bovine creatures" , "Lowers" , "Heavy cattle" , "Domesticated bovines" .)