Related Clues:

• Doctor's order?: Abbr.
• Organization for Spock
• Doctor's org.
• Hosp. workers' org.
• Pt. of the NAACP
• Union: Abbr.
• Docs' gp.
• Special-interest org.
• Grp. with a noted journal
• Part of the NAACP
• Physician's org.
• ''I ___ lineman for the county''
• ''I ___ Rock'' (Simon and Garfunkel hit)
• NRA component
• Doc bloc, for short