Bosses: abbr.
Else clues• Bush and Blair, e.g.: abbr.
• Country runners: Abbr.
• Front-runners: abbr.
• Heads: Abbr.
• Ones in charge (abbr.)
• Ones in chg.
• Orch. chiefs
• PMs or GMs
• Pres. And P.M.
• They run things: Abbr.
• They're at the top of the standings: Abbr.
• Whom followers follow: Abbr.