orchestration, n. — Green’s Dictionary of Slang

orchestration n.

[music jargon orchestration, which ‘wraps around’ the individual scores]

(US black) an overcoat.

1944		Cab Calloway New Hepsters Dict. in Calloway (1976) 258: orchestration (n.): an overcoat.
1944		‘Jiver’s Bible’ in D. Burley Orig. Hbk of Harlem Jive.