Related Clues:

• Serum holder
• Emmett, to Marty, in Back to the Future
• Shot provider
• Vet, e.g.
• OB, e.g.
• Bashful buddy?
• Happy cohort?
• Rx writer
• It has a sticking point
• Sawbones's moniker
• Associate of Wyatt and Virgil
• Bashful housemate
• Shot source
• Prefix with ''glycemic''
• Bashful friend?