Crossword Genius

Second rate shower might collectively display intelligence (5,5)

Ross

I believe the answer is:

brain power

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'intelligence' is the definition.
I know nothing about this answer so I can't judge whether this works.

'second rate shower might' is the wordplay.
'second rate' becomes 'b'.
'shower' becomes 'rain' (rainfall).
'might' becomes 'power' (being mighty).
'b'+'rain'+'power'='BRAIN-POWER'

'collectively display' is the link.

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I've seen this clue in The Guardian.
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