Excellent puzzle - fresh entries, fun cluing, and educational! I'd never heard of 8A8AAnnoyingly small and dissonant music interval that happens in just intonation[-----] in a music context, even though I've been a musician my whole life, and I'm glad to know there's a word for the tuning dilemma. I'd also never heard of that particular cactus, but it was readily gettable from crosses, and TERF25D"Taking JK rowling on a swimming date, call it surf and __" (tweet by @chunkyfila)[----] was new to me as well. Enjoyed it!