One of 1,665 in the Eiffel Tower

STEP

Think of what you use to climb a staircase—this iconic landmark has thousands of them, each one leading you higher.

The Eiffel Tower has 1,665 steps from the ground to the top, so the clue is simply asking for the word that describes one of those individual units. It’s a straightforward definition—no wordplay or tricks—just a fact about the landmark’s structure. If you know the tower’s stats, "step" is the obvious answer.