Crossword Genius

Made the rain pour into and soak (8)

Ross

I believe the answer is:

marinade

I'm a little stuck... Click here to teach me more about this clue!

'soak' is the definition.
(I know that marinade is a more specific form of the action bathe)

'made the rain pour into' is the wordplay.
I cannot really understand how this works, but
an anagram of 'rain' is 'arin' which is present in the answer.
The remaining letters 'made' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'and' acts as a link.

Can you help me to learn more?

(Other definitions for marinade that I've seen before include "Type of star system" , "Soak food before cooking" , "Steep in seasoning" , "Flavouring liquid found in a dream" , "pickle" .)

I've seen this clue in the Evening Standard.
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