Live with more ferocious fox (8)
I believe the answer is:
bewilder
'fox' is the definition.
(I know that bewilder is a more specific form of the action fox)
'live with more ferocious' is the wordplay.
'live' becomes 'be' (synonyms).
'with' means one lot of letters go next to another.
'more ferocious' becomes 'wilder' ('wild' can be similar in meaning to 'ferocious').
'be'+'wilder'='BEWILDER'
(Other definitions for bewilder that I've seen before include "Confuse - perplex" , "Flummox, confuse" , "fox" , "Baffle" , "Deli brew (anag.)" .)