Wing of a house, wing of an army, wing of a battalion or squadron, etc., are the side-pieces which start from the main body, as the wings of birds. Don't try to fly without wings. Attempt nothing you are not fit for. A French proverb. On the wing. Au vol, about to leave. To clip one's wings. To take down one's conceit; to hamper one's action. In French, Rogner les ailes [à quelqu'un]. To lend wings. To spur one's speed.
“This sound of danger lent me wings.”
R. L. Stevenson.
To take one under your wing. To patronise and protect. The allusion is to a hen gathering her chicks under her wing. To take wing. To fly away; to depart without warning. (French, s'envoler.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894