The Galaxy (5,3)
I believe the answer is:
milky way
'the galaxy' is the definition.
(Milky Way is an example)
This is all the clue.
(Other definitions for milky way that I've seen before include "Millions of stars in a band of light across the night sky" , "Star-studded band" , "Lots of stars" , "Galaxy containing our solar system" , "Starry band of light across the night sky" .)