My attempt done, mess needs sorting out (8,2)

I believe the answer is:

goodness me

'my' is the definition.
(both are expressions of surprise)

'attempt done mess needs sorting out' is the wordplay.
'attempt' becomes 'go' (go is a kind of attempt).
'needs sorting out' indicates an anagram (I've seen this in other clues).
'done'+'mess'='donemess'
'donemess' with letters rearranged gives 'odnessme'.
'go'+'odnessme'='GOODNESS ME'

(Another definition for goodness me that I've seen is " Well, well!".)

I've seen this clue in The Guardian.

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