Crossword Genius

In this event, one may be for it (4,4)

Ross

I believe the answer is:

high jump

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

'in this event one may be for it' is the definition.
'high jump' can be an answer for 'event' (high jump is a kind of event). I'm not certain of the remainder of the definition.

'in this event' is the wordplay.
'in this' becomes 'high' (I can't explain this - if you can you should believe this answer much more).
'event' becomes 'jump' (jump is a kind of event).
'high'+'jump'='HIGH JUMP'

Can you help me to learn more?

(Other definitions for high jump that I've seen before include "Event for the upwardly mobile" , "Athletics event (for those being punished?)" , "be in trouble for this?" , "A severe reprimand" , "bar activity?" .)

I've seen this clue in The Globe and Mail.
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