Jimmy

"Gasoline brand that offered the Torch Club credit card" ...until the 1980s. Your clue relies on a retailer-specific credit card that was phased out forty years ago? Really? Yeesh. There's challenging, and then there's arbitrarily arcane.

Came for the crossword. Stayed for a dog balanced on a rolling basket during a show in Siliguri, India, in 2013.

Really fun theme, but "in a trice" felt cruel! Per Merriam Webster, chiefly a British phrase, and intersected with a few really tricky down-oriented clues. Oof. Still a solid Sunday game, though.

I don't think reverb is inherently electronic: analog spring and plate reverbs—not their electronic approximations—have been around in things like Wurlitzer organs since the 1930s. That, along with another commenter correctly pointing out how Echo/Reverb are distinct effects, makes 36 Down's clue in general a bit vague/misleading. A good crossword to start the working week regardless!