One of three fire signs, with Aries and Sagittarius Crossword Clue

 The answer to the crossword clue "One of three fire signs, with Aries and Sagittarius" is LEO.

The zodiac signs are divided into four elements: fire, earth, air, and water. The fire signs are Aries, Leo, and Sagittarius. These signs are associated with passion, creativity, and enthusiasm.

Here are some examples of other fire signs:

Aries: The Ram, ruled by Mars

Leo: The Lion, ruled by the Sun

Sagittarius: The Archer, ruled by Jupiter

I hope this helps!