1) Clear 2) Clear and bright 3) Clear, transparent 4) Crystal clear 5) Easily understandable 6) French word used in English 7) Like some prose 8) Liquid 9) Not at all clouded 10) Perfectly clear 11) Translucent 12) Transmitting light 13) Transparent 14) Transparently clear 15) Unclouded Found on https://www.crosswordclues.com/clue/limpid
Lim'pid (-pĭd) adjective [ Latin limpidus ; akin to Greek la`mpein to shine: confer French limpide . Confer Lamp .] Characterized by clearness or transparency; clear; as, a limpid stream. « Springs which were clear, fresh, and limpid .»... Found on http://www.encyclo.co.uk/webster/L/44