Related Clues:

• Underlying support
• Ignoble, military site
• Found bed low
• Such as lime or caustic soda
• Ignoble; low part
• Foul voice coming over the radio
• Substance such as lime or caustic soda
• Lowest part; ignoble
• Found to be unprincipled
• Bottom's centre of operations?
• Low; foundation
• Such as, eg, caustic soda
• Bottom support
• Venial; headquarters
• Eg, lime or caustic soda