Instrument That Uses Shadows to Tell the Time
This page is the CodyCross answer for the clue below from Resorts, Group 548, Puzzle 2 (Visit Ancient Ruins).
Question is: Instrument That Uses Shadows to Tell the Time
and the answer is: SUNDIAL
Word Meaning:
SUNDIAL — A device measuring the time of day by the position of a shadow cast by a pole or plate (gnomon) upon an engraved series of marks.
Definitions from Wiktionary.