B___ shower head! (5)

I believe the answer is:

brain

'head' is the definition.
(synonyms)

'b shower' is the wordplay.
'shower' becomes 'rain' (rainfall).
'b'+'rain'='BRAIN'

(Other definitions for brain that I've seen before include "Control centre of nervous system" , "It controls the central nervous system" , "Whack on the head" , "Mind" , "Thinking organ" .)

I've seen this clue in The Independent.

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