What does the cryptic crossword clue "Yoke the best man, disgruntled, for that reason (2,3,4,5)" mean?

The wordplay uses an anagram. anagram of YOKE + THE + BEST + MAN, = BYTHESAMETOKEN The answer is BYTHESAMETOKEN.

Yoke the best man, disgruntled, for that reason (2,3,4,5)

Daily Mail Cryptic #17183 | 26 Across | 2023-09-12 flower