Stain Antony twice discovered under the table (6)
I believe the answer is:
blotto
'under the table' is the definition.
(I've seen this before)
'stain antony twice' is the wordplay.
'stain' becomes 'blot' ('blot' can be a synonym of 'stain').
'antony twice' becomes 'to' (I can't justify this - if you can you should believe this answer much more).
'blot'+'to'='BLOTTO'
'discovered' acts as a link.
Can you help me to learn more?
(Other definitions for blotto that I've seen before include "Wasted" , "Totally drunk" , "Slangily drunk - ready to bolt" , "Unconscious from drink" , "As one plastered" .)