Case file LinkedIn Crossclimb #892: 4-letter ladder, 5 middle exhibits, combo prompt "A two-word phrase for something that lasts for two beats in a piece of music in 4/4 time.". Endpoints: HALF (top) and NOTE (bottom).
Middle phase answers: "___ and hearty (in good physical condition)" = HALE; "Long-eared animal related to the rabbit" = HARE; "Challenge to do something risky" = DARE; "10/10/26, for example" = DATE; "Lavish affection (on)" = DOTE.
Ordering phase: the valid middle chain is HALE → HARE → DARE → DATE → DOTE. This permutation is the only valid one-letter chain for these answers.
Evidence link: HALF → HALE. F→E at the fourth letter (HALF → HALE).
Evidence link: HALE → HARE. L→R at the third letter (HALE → HARE).
Evidence link: HARE → DARE. H→D at the first letter (HARE → DARE).
Evidence link: DARE → DATE. R→T at the third letter (DARE → DATE).
Evidence link: DATE → DOTE. A→O at the second letter (DATE → DOTE).
Evidence link: DOTE → NOTE. D→N at the first letter (DOTE → NOTE).
Verdict: HALF → HALE → HARE → DARE → DATE → DOTE → NOTE satisfies every one-letter constraint. The combo clue "A two-word phrase for something that lasts for two beats in a piece of music in 4/4 time." describes both end words together — "HALF" and "NOTE" each differ by one letter from their adjacent middle rungs and satisfy the shared top+bottom prompt.