Lassie from Sirius? (3,4)
I believe the answer is:
dog star
I believe this clue is a double definition.
'lassie' is the first definition.
(I've seen this before)
'sirius?' is the second definition.
(Sirius is the Dog Star)
'from' is the link.
(Other definitions for dog star that I've seen before include "clearly visible shiner" , "Canine constellation" , "Drags to find other name for Sirius" , "Sirius may also be arts god" , "heavenly body?" .)