This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
鋓 combines 金 (metal) with 利 (sharp, profit), but the exact historical development is uncertain. It may be a phono-semantic compound, but the meaning is not clearly established.
The left side is metal 金, and the right side is 利 (sharp, profit). Imagine a sharp metal tool, but since the meaning is unclear, picture it as an unknown sharp metal object.
For テン, imagine ten sharp metal tools lined up: ten -> テン, and each one is made of 金 with a 利-like edge.