Case file LinkedIn Crossclimb #842: 4-letter ladder, 5 middle exhibits, combo prompt "A compound word for what a detective or government employee takes on.". Endpoints: CASE (top) and WORK (bottom).
Middle phase answers: "Large barrel-shaped container for wine or other liquids" = CASK; "What a superhero wears to protect their other identity" = MASK; "“You're way off the ___” (far from accurate)" = MARK; "Grassy area for public enjoyment" = PARK; "Type of meat served at a pig roast" = PORK.
Ordering phase: the valid middle chain is CASK → MASK → MARK → PARK → PORK. This permutation is the only valid one-letter chain for these answers.
Evidence link: CASE → CASK. E→K at the fourth letter (CASE → CASK).
Evidence link: CASK → MASK. C→M at the first letter (CASK → MASK).
Evidence link: MASK → MARK. S→R at the third letter (MASK → MARK).
Evidence link: MARK → PARK. M→P at the first letter (MARK → PARK).
Evidence link: PARK → PORK. A→O at the second letter (PARK → PORK).
Evidence link: PORK → WORK. P→W at the first letter (PORK → WORK).
Verdict: CASE → CASK → MASK → MARK → PARK → PORK → WORK satisfies every one-letter constraint. The combo clue "A compound word for what a detective or government employee takes on." describes both end words together — "CASE" and "WORK" each differ by one letter from their adjacent middle rungs and satisfy the shared top+bottom prompt.