Possible Clues:

• It goes with tele- or epi-
• Scale marking, perhaps
• -- Parsons, country rock singer and a member of The Byrds in 1968
• Parsons whose band was the first to record 'Wild Horses'
• Parsons of The Byrds
• About 0.035 ounce
• Dollar bill weight, roughly
• Weight of chickpeas
• Chem lab measure
• Carb measure