All lit up Crossword Clue

 The answer to the crossword clue "All lit up" is ABLAZE.

The word "ablaze" means "on fire" or "burning brightly." It can also be used to describe someone who is very excited or enthusiastic.

Here are some examples of how the word "ablaze" can be used in a sentence:

The Christmas tree was ablaze with lights.

The crowd was ablaze with excitement for the concert.

The forest was ablaze after the lightning strike.

I hope this helps!