What does the cryptic crossword clue "Man rings club members - that's the procedure with clues like this (12)" mean?

The wordplay uses an anagram. anagram of MAN + RINGS + CLUB = UNSCRAMBLING The answer is UNSCRAMBLING.

Man rings club members - that's the procedure with clues like this (12)

Guardian Cryptic #23870 | 13 Across | 2006-09-13 flower