Possible Clues:

• Slanted type, for short
• Stressed type, for short
• Biased writing?: Abbr.
• Alt. to underlining
• Stressful type, for short
• W.W. II Axis members: Abbr.
• Tilted type: Abbr
• Tilted type, for short
• Slanted letters: Abbr
• Right-leaning type, briefly