Animal fighting unsettled Goth (7)
I believe the answer is:
warthog
'animal' is the definition.
(thesaurus)
'fighting unsettled goth' is the wordplay.
'fighting' becomes 'war'.
'unsettled' indicates an anagram.
'goth' with letters rearranged gives 'thog'.
'war'+'thog'='WARTHOG'
(Other definitions for warthog that I've seen before include "A growth (anag) - African animal" , "Wild boar of Africa" , "Beast" , "African wild pig" , "African native" .)