Crossword Genius

A plane is out of the way (5)

Ross

I believe the answer is:

aside

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

'is out of the way' is the definition.
(I've seen this before)

'a plane' is the wordplay.
'plane' becomes 'side' (I can't explain this - if you can you should believe this answer much more).
'a'+'side'='ASIDE'

Can you help me to learn more?

(Other definitions for aside that I've seen before include "Apart; incidental remark" , "(Pushed) out of the way" , "Actor's covert line" , "Remark by an actor, directly to audience say" , "Where one's taken for intimacy" .)

I've seen this clue in The Telegraph.
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