Admire a speaking dog from Russia (5)
'dog from russia' is the definition.
(Laika the dog was sent to space by Russia)
'admire a' is the wordplay.
'admire' becomes 'laik' (I can't explain this - if you can you should give a lot more credence to this answer).
'speaking' is the link.
I am not very happy about this link. It may be part of another bit of the clue.
(Other definitions for laika that I've seen before include "early space traveller", "Soviet dog in space", "First dog in orbit", "famous dog".)