Rendered senseless from drink (9)
I believe the answer is:
plastered
'rendered' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for plastered that I've seen before include "Intoxicated" , "under the table?" , "spread" , "Might ceilings be" , "Drunk (as a ceiling or wall may be)" .)