This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
瓼 combines 瓦 (tile, pottery) with 里 (village, unit of distance). The exact historical development is uncertain, and the character is rare.
The kanji visually contains 瓦 (tile) enclosing 里 (village). Picture a village of tiled roofs, but remember the meaning is unclear.
For さらけ, imagine a village (里) where every tile (瓦) is exposed (さらけ出す) to the sun: さらけ -> さらけ.
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