Crossword Clue 5 2 3 4 — Useful Material Or Knowledge

None of these variations fit the precise 5‑2‑3‑4 pattern, so when you encounter that exact combination, “grist to the mill” is the intended solution.

Wait, maybe it's "STUFF OR KNOWHOW"? "STUFF" (5), "OR" (2), "KNOWHOW" (7) – no. useful material or knowledge crossword clue 5 2 3 4

Given the pattern, I recall a known crossword solution: ? GOLD is 4, but “store of gold” isn’t “knowledge.” None of these variations fit the precise 5‑2‑3‑4