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Exasperated utterance, revolting slop he put before setter (2,4,2)

Ross

I believe the answer is:

so help me

'exasperated utterance' is the definition.

'revolting slop he put before setter' is the wordplay.
'revolting' indicates an anagram.
'put before' means one lot of letters go next to another.
'setter' becomes 'me' (the setter of the clue).
'slop'+'he'='slophe'
'slophe' is an anagram of 'sohelp'.
'sohelp'+'me'='SO HELP ME'

(Another definition for so help me that I've seen is " On my word".)

I've seen this clue in The Everyman puzzle in The Observer.
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