A raucous “Shut up and put the water on!” (6)

I believe the answer is:

shrill

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'a raucous' is the definition.
(thesaurus)

'shut up and put the water on' is the wordplay.
'shut up' becomes 'sh'.
'and' means one lot of letters go next to another.
'put the water on' becomes 'rill' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'sh'+'rill'='SHRILL'

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(Other definitions for shrill that I've seen before include "Of voice, high-pitched and piercing" , "Loud and high-pitched" , "High and piercing" , "Ear-piercing" , "Of voice, highl-pitched and loud" .)

I've seen this clue in the Evening Standard.

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