Crossword Genius

Is such diving a bit risky? (3)

Ross

I believe the answer is:

sky

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

'is such diving a bit' is the definition.
I can't tell whether this defines the answer.

'risky?' is the wordplay.
'SKY' is hidden within the letters.
But, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for sky that I've seen before include "Orbiting space-station" , "Strike up" , "-- Blue" , "Hit high into the air" , "Upper region, empyrean" .)

I've seen this clue in the Evening Standard.
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