Star-gazer (10)
I believe the answer is:
astronomer
'star-gazer' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for astronomer that I've seen before include "Sky-at-night observer" , "Dorado may be contemplated by me" , "Space studier" , "Star-watcher" , "Stargazer" .)