Crossword Genius

Some organise minor stage in knockout competition (4)

Ross

I believe the answer is:

semi

I'm a little stuck... Click here to teach me more about this clue!

'knockout competition' is the definition.
'semi' can be an answer for 'competition' (semi is a kind of competition). I am not certain of the 'knockout' bit.

'some organise minor stage' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'SEMI' is hidden within 'organise minor stage'.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for semi that I've seen before include "half would do!" , "place" , "important match" , "One house of pair" , "A whole house (or half?)" .)

I've seen this clue in The Guardian.
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