Follow closely (3)
'follow closely' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dog that I've seen before include "St Bernard, for example" , "plague?" , "Follow; pet" , "Follow closely; animal" , "Domestic animal" .)
'follow closely' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for shadow that I've seen before include "Sort of boxer - dog" , "Partial or complete darkness" , "Area of darkness caused by obstructing light" , "It's cast by something blocking light" , "Dark area, weak remnant (of something)" .)