Base (3)
'base' is the definition.
(both can mean dishonourable or shameful)
This is the entire clue.
(Other definitions for ignoble that I've seen before include "Debased in character or purpose" , "in a lower category" , "degenerate" , "I belong (anag)" , "Humble; despicable" .)
'base' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for bottom that I've seen before include "mechanic, for instance" , "Lowest of the low" , "Sea bed; lowest point" , "Rump" , "Least successful position" .)
'base' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for plinth that I've seen before include "Block or slab forming base of column" , "Support for statue or column" , "Stand" , "Base supporting a statue" , "Base of column or statuary" .)
'base' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for low that I've seen before include "Dejected; moo" , "Inferior; not loud" , "Humble; dejected" , "Not high - that's mean" , "Without great height" .)
'base' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for headquarters that I've seen before include "Centre of operations" , "Main office" , "Operational centre" , "HQ" , "Military command point" .)
'base' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for vile that I've seen before include "Despicable in evil way" , "Detestable" , "Evil - evil (anag)" , "Morally reprehensible" , "Noxious" .)
'base' is the definition.
(I know that base can be written as foundation)
This is all the clue.
(Other definitions for foundation that I've seen before include "cosmetic aid?" , "Artificial jet of water" , "Base" , "Underlying basis" , "Establishment" .)