Crossword Genius

Karate expert from Berlin threatening opponent (6,3)

Ross

I believe the answer is:

danger man

'threatening opponent' is the definition.
(sportsperson posing a threat to the opposition)

'karate expert from berlin' is the wordplay.
'karate expert' becomes 'dan' (person who has been awarded a dan in karate).
'from berlin' becomes 'German' (Berlin is in Germany).
'dan'+'german'='DANGER MAN'

(Another definition for danger man that I've seen is " Adventurous comic hero".)

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