He knows that he's followed, all right, and he's cagy enough to keep in the open and pretend to be aboveboard.
You'd be surprised at how cagy those officers got after a few of them had been captured.
But this time he was in wrong; I'd been dumped by him so often that I was cagy.
He's squintin' at me foxy out of them shifty eyes of his, cagy and suspicious, like we was playin' some kind of a game.
"evasive, reticent," 1896, U.S. colloquial, of unknown origin. Earlier in English dialect it meant "sportive."
Shrewd; wary; pawky: a quiet, cagy observer
[1890s+; perhaps fr the expression play a caged game, ''be careful, keep your intentions concealed,'' attested in 1890s]