The most common and most likely answer to this crossword clue is the 5 letter word PLUTO
I've seen this crossword clue in Independent
P
L
U
T
O
More clues leading to the result PLUTO
- Body recently demoted from place ordered out
- Dog star? / A much smaller heavenly body
- Heavenly body starts off pretty luscious, until tragically old
- Left in place old Disney character
- Greek philosopher half ignored old Roman god
- Set to inspire love primarily, love god!
- Funny dog in quiet Bedfordshire town devoid of tail
- Hellish character, government by the wealthy? Not half
- God starts to punish lying, untrustworthy, thieving oligarchs
- Applaud Thom, regularly walking Mickey’s dog
Buddy explains!

The straight part
We know that "God" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case god = pluto.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.