Possible Clues:

• 1/3 tbs.
• One of a tbsp.'s three
• Letters on a tiny kitchen implement
• Shortening in recipes
• It's sometimes heaping: Abbr.
• Amt. that may be "heaping"
• Baker's amt.
• Rx dosage, sometimes
• Vanilla extract meas., maybe
• A bit more than two pct. of a cup