Torn anorak? Go get a jumper! (8)
I believe the answer is:
kangaroo
'a jumper' is the definition.
(thesaurus)
'torn anorak? go' is the wordplay.
'torn' indicates an anagram.
'anorak'+'go'='anorakgo'
'anorakgo' anagrammed gives 'KANGAROO'.
'get' is the link.
(Other definitions for kangaroo that I've seen before include "Bounding marsupial" , "Marsupial from down-under" , "Marsupial (both parts 4's friends)" , "Native marsupial Down Under" , "one jumps" .)