Crossword Genius

I cut arm at training, which is distressing (9)

Ross

I believe the answer is:

traumatic

'is distressing' is the definition.
(I've seen this before)

'i cut arm at training' is the wordplay.
'training' indicates an anagram (to train can mean to grow something into a shape).
'i'+'cut'+'arm'+'at'='icutarmat'
'icutarmat' anagrammed gives 'TRAUMATIC'.

'which' acts as a link.

(Other definitions for traumatic that I've seen before include "Psychologically painful" , "Deeply disturbing" , "Direly shocking" , "Deeply distressing" , "Emotionally shocking" .)

I've seen this clue in The Independent.
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