Related Clues:

• RPM dial
• English river
• Engine disk
• Twin-___ engine
• Part of a rotating shaft
• Sound receiver
• Shortwave, e.g.
• Imus' medium
• Location identifier: Abbr.
• Dashboard item
• Modern orientation syst.
• Police car feature
• Ham, for one
• Part of a dash
• Donna Summer's 'On the --'