Historical clue formulations

• Oranges, but not apples — 2025-12-04
• Like oranges and tangerines — 2008-09-01
• Kumquat, for one — 2007-10-14
• Vitamin C source — 2001-07-29
• Like oranges and lemons — 2000-08-07
• Limelike — 1996-11-23
• Lemon, e.g. — 1994-03-20