Delhi belly’s attack over Greek goddess (8)

I believe the answer is:

diarrhea

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'delhi belly's attack over greek goddess' is the definition.
I can't judge whether this definition defines the answer.

'attack over greek goddess' is the wordplay.
'attack' becomes 'raid' (raid is a kind of attack).
'over' is a reversal indicator.
'greek goddess' becomes 'rhea' (I've seen this before. I am not sure about the 'greek' bit.).
'raid' backwards is 'diar'.
'diar'+'rhea'='DIARRHEA'

Can you help me to learn more?

(Another definition for diarrhea that I've seen is " runs in Kentucky".)

I've seen this clue in The Hindu.

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