MESCAL - anagram of CAMELS. Mescal is a cactus which if chewed, when dried, produces halucinations - it contains the compound used in the drug mescaline. This gives you the L for your other clue.
Bradford's Crossword Dictionary lists under 'drugs'...MESCLA?
Never heard of either so trusted the book!
You have to battle sometimes to arrive at the solution!
All sorted out now. Thank you all!!