Slang term for marijuana. Used mainly in the 40s and 50s by beat hipsters.
Alas, there was no winner, but kudos to Tuffenuf for discerning that the embedded clue was "brownies." Kudos also to everyone for not cheating...you are either very honorable people or frightened by my immense powers.
BTW, elitch is not listed in the Merriam Webster Dictionary. It took a very deep Google search which led me here, the Urban Dictionary. Who knew?!?!?!?!
Thanks for playing along...it was most entertaining.