This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
薼 is a rare character. It combines the grass radical 艹 with 塵 (dust), but the historical development and original meaning are uncertain.
The grass radical 艹 sits above 塵 (dust), suggesting a plant growing in dusty soil. Without a clear meaning, picture a dusty weed.
For チン, imagine a chin-high dusty weed: chin -> チン, and the plant grows in the dust.