Crossword Genius

It's on the wing (7)

Ross

I believe the answer is:

aileron

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

'wing' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'it's on' is the wordplay.
'it's' becomes 'ailer' (I am not sure about this - if you are sure you should believe this answer much more).
'ailer'+'on'='AILERON'

'the' acts as a link.

Can you help me to learn more?

(Other definitions for aileron that I've seen before include "Wing control flap" , "Movable part of an airplane wing" , "Movable part of an aircraft's wing" , "Moveable part of aircraft wing" , "Aircraft's wing foil that controls lateral motion" .)

I've seen this clue in the Evening Standard and the L.A. Times Sunday.
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