Half forced into German river on tour, but greatly improved (8)

I believe the answer is:

enriched

I'm a little stuck... Click here to teach me more about this clue!

'improved' is the definition.
(enriching is a kind of improving)

I don't understand how the rest of the clue works.

(Other definitions for enriched that I've seen before include "Made wealthier" , "Improved in quality - made wealthy" .)

I've seen this clue in The Irish Times.

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.