Gosh! Sky! (7)
I believe the answer is:
heavens
This clue is a double definition.
'gosh' is the first definition.
(interjections!)
'sky' is the second definition.
(I've seen this before)
(Other definitions for heavens that I've seen before include "Gosh!" , "Expression of astonishment" , "Save hen (anag.)" , "Exclamation of surprise" , "Goodness" .)