CARTEL
| Date | Clue |
|---|---|
| 2019-02-10 | Syndicate |
| 2013-07-16 | OPEC is one |
| 2012-05-23 | OPEC, e.g. |
| 2008-05-27 | OPEC, e.g. |
| 2008-02-23 | Trust |
| 2005-03-06 | Price fixer |
| 2004-02-17 | OPEC is one |
| 2001-06-15 | Trustbuster's concern |
| 2000-12-10 | Syndicate |
| 1998-04-29 | Price fixers |
| 1996-11-17 | Business combine |
| 1995-03-24 | Business group |
| 1994-03-20 | Business bloc |