This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
錪 combines the metal radical 金 with the phonetic component 典, but its exact historical development and original meaning are uncertain.
The metal radical 金 suggests something related to metal, perhaps a type of pot or kettle (かま), but the overall meaning is unclear.
For テン, picture ten metal pots (かま) lined up: ten -> テン, and the metal radical 金 reinforces the image.