This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
鏍 is a phono-semantic compound with 金 (metal) and 累 (phonetic), but its exact historical meaning is uncertain.
The left side is metal 金, and the right side is 累 (accumulate). Picture a pile of accumulated metal objects, but remember that the actual meaning is unclear.
For ラ, imagine a large pile of metal (la as in 'large') accumulating on the right: la -> ラ.