I'm at stag bash - getting unexplained injuries (8)

I believe the answer is:

stigmata

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'getting unexplained injuries' is the definition.
I can't judge whether this defines the answer.

'i'm at stag bash' is the wordplay.
'bash' is an anagram indicator.
'im'+'at'+'stag'='imatstag'
'imatstag' with letters rearranged gives 'STIGMATA'.

Can you help me to learn more?

(Other definitions for stigmata that I've seen before include "Marks resembling Christ's wounds" , "Distinguishing marks; the wounds of Christ" , "Mercian king who built dyke" , "Marks corresponding to the wounds on Christ's body" , "Christ's marks of crucifixion" .)

I've seen this clue in the Sydney Morning Herald.

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