Lift, as a mood (7)

I believe the answer is:

lighten

(Other definitions for lighten that I've seen before include "Make less dark or heavy" , "Get blonde" , "Make less burdensome" , "Illuminate" , "Make brighter or less heavy" .)

I've seen this clue in The Wall Street Journal.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.