Crossword Genius

Silly trick in PE leaves one in critical condition (3-6)

Ross

I believe the answer is:

nit-picker

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'one in critical condition' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'silly trick in pe' is the wordplay.
'silly' is an anagram indicator.
'trick'+'in'+'pe'='trickinpe'
'trickinpe' is an anagram of 'NIT-PICKER'.

'leaves' is the link.

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