This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
錜 combines 金 (metal) with 念, but the exact historical development is uncertain. It may have been a phono-semantic compound, but no clear meaning is preserved.
The left side is metal 金 and the right side is 念 (thought). Picture a metal hairpin that holds thoughts together, but remember its meaning is uncertain.
For ジョウ, imagine a metal hairpin shaped like a 城 (じょう, castle): 城 -> ジョウ, and the metal pin keeps your hair in place.