Used a chair Crossword Clue

 The answer to the crossword clue "Used a chair" is SAT.

This is a straightforward clue, as the word "sat" is the past tense of the verb "to sit," which means to occupy a chair or other seat. When we use a chair, we are sitting on it.

Here are some examples of how the word "sat" might be used in a sentence:

I sat down in the chair and took a deep breath.

The students sat quietly at their desks.

The cat sat on the windowsill and watched the birds.

I hope this helps!