The Clue
Subway branches (3 letter answer)
The Answer
ELS
Tags
Notes
The answer ELS is very common and appears about once every 42 puzzles.
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Definition
EL as a noun:
1. (elevation, EL, altitude, ALT) = angular distance above the horizon (especially of a celestial object)
2. (elevated railway, elevated railroad, elevated, el, overhead railway) = a railway that is powered by electricity and that runs on a track that is raised above the street level