God is object of American missions (4)
I believe the answer is:
mars
This clue could be a double definition.
'god' is the first definition.
(Mars is an example)
'object of american missions' is the second definition.
'Mars' can be an answer for 'object' (Mars is an example). I'm not certain of the 'of american missions' bit.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for mars that I've seen before include "Where Beagle 2 was landed on 25 December 2003" , "Possibly pollutes" , "Spoils - planet" , "Next planet out" , "classical god" .)