United over Yankee god (5)
I believe the answer is:
deity
'united over yankee god' is the definition.
'deity' can be an answer for 'god' (synonyms). I am not certain of the 'united over yankee' bit.
'united over yankee god' is the wordplay.
'united' becomes 'tied' (similar in meaning).
'over' shows that the letters should be reversed in order.
'yankee god' becomes 'y' (I can't explain this - if you can you should give a lot more credence to this answer).
'tied' in reverse letter order is 'deit'.
'deit'+'y'='DEITY'
Can you help me to learn more?
(Other definitions for deity that I've seen before include "God or goddess" , "Supernatural being" , "Divinity" , "Supreme being" , "Refuge" .)