Animal suffered, by all accounts (4)
I believe the answer is:
boar
'animal' is the definition.
(I've seen this before)
'suffered by all accounts' is the wordplay.
'suffered' becomes 'bore' (I've seen this before).
'by all accounts' indicates a 'sounds like' (homophone) clue ('by all accounts' can mean 'we hear').
'bore' sounds like 'BOAR'.
(Other definitions for boar that I've seen before include "Sow's mate" , "A male pig, sounds tedious" , "A wild male pig" , "Uncastrated male pig" , "Wild animal, sounds like drill" .)