Case file Crossclimb Level 7: 4-letter ladder, 5 middle exhibits, combo prompt "Sunset dinner". Endpoints: WEST (top) and FEED (bottom).
Middle phase answers: "Opinion when something is great" = BEST; "Hold up your pants" = BELT; "Defeat in a race" = BEAT; "Red root vegetable" = BEET; "They end at your ankles" = FEET.
Ordering phase: the valid middle chain is BEST → BELT → BEAT → BEET → FEET. Note: reverse order also steps one letter at a time, but only this orientation matches the stored top and bottom slots.
Evidence link: WEST → BEST. W→B at the first letter (WEST → BEST).
Evidence link: BEST → BELT. S→L at the third letter (BEST → BELT).
Evidence link: BELT → BEAT. L→A at the third letter (BELT → BEAT).
Evidence link: BEAT → BEET. A→E at the third letter (BEAT → BEET).
Evidence link: BEET → FEET. B→F at the first letter (BEET → FEET).
Evidence link: FEET → FEED. T→D at the fourth letter (FEET → FEED).
Verdict: WEST → BEST → BELT → BEAT → BEET → FEET → FEED satisfies every one-letter constraint. The combo clue "Sunset dinner" describes both end words together — "WEST" and "FEED" each differ by one letter from their adjacent middle rungs and satisfy the shared top+bottom prompt.