Possible Clues:

• January's Jr.
• Jan. inits
• ___ Day, Jan. celebration
• March on Washington monogram
• "Letter from Birmingham Jail" initials
• Density symbol
• Annual Jan. honoree
• 'Letter From Birmingham Jail' initials
• Big name in civ. rights
• Who said 'True compassion is more than flinging a coin to a beggar,' for short