Crossword Genius

Holding there may be a rain storm to follow (2,3,4)

Ross

I believe the answer is:

in the rear

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'storm to follow' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'holding there may be a rain' is the wordplay.
'holding' indicates putting letters inside.
'may be' indicates an anagram.
'rain' with letters rearranged gives 'inar'.
'there' placed into 'inar' is 'IN THE REAR'.

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