This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
鍗 combines 金 (metal) with 帝, which likely contributes the sound. The exact historical development is uncertain.
The metal radical 金 suggests something made of metal, but the overall meaning is unclear. Picture a mysterious metal object marked with the symbol 帝.
For テイ, imagine a metal tray (テイ) with the 帝 symbol engraved on it: tray -> テイ.