Alternative to mushrooms

LSD

["This psychedelic compound, derived from ergot fungus, was popularized in 1960s counterculture for its mind-altering effects."]

This clue plays on the idea that both mushrooms (specifically psilocybin mushrooms) and LSD are psychedelic drugs. The word "alternative" hints that you're looking for something else in the same category, not a literal mushroom substitute. It’s a straightforward example of a cryptic clue where the answer is another hallucinogenic, with LSD being the most well-known one. The trick is recognizing the shared context of psychedelics rather than food.