Crossword Genius

I'm very annoyed at odd GM I'm playing (9)

Ross

I believe the answer is:

goddammit

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'i'm very annoyed' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'at odd gm i'm playing' is the wordplay.
'playing' indicates an anagram.
'at'+'odd'+'gm'+'im'='atoddgmim'
'atoddgmim' anagrammed gives 'GODDAMMIT'.

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I've seen this clue in The Independent.
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