Left in denial after losing case over drug (8)
I believe the answer is:
atropine
'drug' is the definition.
(I've seen this before)
'left in denial after losing case over' is the wordplay.
I cannot quite see how this works, but
'in' is within the answer.
'over' could be 'o' (cricket abbreviation) and 'o' is located in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for atropine that I've seen before include "Poisonous substance" , "A pointer (anag) - belladonna" , "Drug obtained from deadly nightshade" , "Poison found in deadly nightshade used as a drug" .)