Former manager of Ajax, Barcelona, AZ Alkmaar, Bayern Munich and Manchester United who has had three spells in charge of the Netherlands national team (5,3,4)

I believe the answer is:

louis van gaal

I've seen this clue in The Independent.

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.