"the __ Knows," Line Spoken in 1930's Radio Series
This page is the CodyCross answer for the clue below from Ballroom Dancing, Group 1928, Puzzle 5 (Passionate).
Question is: "the __ Knows," Line Spoken in 1930's Radio Series
and the answer is: SHADOW
Word Meaning:
SHADOW — A dark image projected onto a surface where light (or other radiation) is blocked by the shade of an object.
Definitions from Wiktionary.