The most common and most likely answer to this crossword clue is the 4 letter word ARES
I've seen this crossword clue in Independent
A
R
E
S
More clues leading to the result ARES
- “Stars” would exclude one the equivalent of Mars
- God shows an interest? Not at first!
- God! More than 100 square metres
- God has half the angels returning
- Barest essentials needed for superhuman being
- God has no time for a break
- Looks to dispose of stone god
- Belligerent god in paradise, rather laid back
- Land measures Arkansas uses are un-American
- Deity wanting manna for the gods, by all conclusions
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 = ares.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.
What does ARES mean?
ARES noun- An accepted (but deprecated and rarely used) SI unit of area equal to 100 square metres, or a former unit of approximately the same extent. Symbol: a.