The Oxford Thesaurus An A-Z Dictionary of Synonyms - set-upn.

1) arrangement, system, organization, layout, regime, structure, make-up, composition, framework, frame, construction; conditions, circumstances: This set-up of interlocking directorships makes it difficult to see who answers to whom and who owns what. What, exactly, is the set-up between you and Eustace? 2 prearrangement, trap, Slang put-up job: As soon as I saw the police car, I knew we had walked into a set-up.