Foe messed with lieutenant's head, TV ace making U-turn (5-4)

I believe the answer is:

volte-face

(Other definitions for volte-face that I've seen before include "Complete change of attitude towards something" , "A complete chnage of mind or attitude" , "Complete change of attitude from French" , "About-face, major change of attitude" , "A complete change of mind or attitude" .)

I've seen this clue in The Guardian.

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.