Call to dog to get bird (8)
I believe the answer is:
ringtail
'bird' is the definition.
(ringtail is a kind of bird)
'call to dog' is the wordplay.
'call' becomes 'ring' (synonyms).
'to dog' becomes 'tail' (synonyms).
'ring'+'tail'='RINGTAIL'
'to get' acts as a link.
(Other definitions for ringtail that I've seen before include "Type of cat" , "Possum" , "Sort of cat" , "creature" , "Sleepwalker" .)