Green’s Dictionary of Slang

bereft of funds, impoverished.

1858		A. Mayhew Paved with Gold 361: I must myself set about something, for I’m cleared out.
1888		‘’Arry on Marriage’ in Punch 29 Sept. 156/1: Seven mouths and six weeks out of work, mate! In Queer Street, and cleared of the quids!
1898		B. Harte Stories in Light 91: The unfortunate ‘bucker’ was cleared out not only of his gains, but of his original investment [DA].