Fox eating a weasel (4)
I believe the answer is:
toad
'weasel' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'fox eating a' is the wordplay.
'fox' becomes 'tod' (historic term).
'eating' indicates putting letters inside.
'tod' placed around 'a' is 'TOAD'.
Can you help me to learn more?
(Other definitions for toad that I've seen before include "Hateful person; animal" , "not found in Ireland" , "Dangerous driver" , "Contemptible person" , "Ugly creature, jewel in head (AYLI)" .)