Neglected animal given signal amid tangled gorse (6,3)

'neglected animal' is the definition.
(dog which has been neglected or mistreated)

'given signal amid tangled gorse' is the wordplay.
'given signal' becomes 'cued' (to be cued is to be given a signal or prompt).
'amid' means one lot of letters goes inside another.
'tangled' indicates an anagram.
'gorse' with letters rearranged gives 'resog'.
'cued' put inside 'resog' is 'RESCUE DOG'.