What does the cryptic crossword clue "Increase the value of part EU played (6)" mean?

The definition is "Increase". The wordplay uses an anagram. anagram of PART + EU = UPRATE; definition: "Increase" The answer is UPRATE.

Increase the value of part EU played (6)

Daily Mail Cryptic #17327 | 3 Down | 2024-04-02 flower