They Were Traditionally Made of Ebony and Ivory
This page is the CodyCross answer for the clue below from Top Secret, Group 2086, Puzzle 4 (Undercover Story).
Question is: They Were Traditionally Made of Ebony and Ivory
and the answer is: PIANOKEYS
Word Meaning:
PIANO KEYS — (aviation, slang) The large white striped section at the ends of a runway, used as a landing aiming point and as a distance indicator.
Definitions from Wiktionary.