What does the cryptic crossword clue "Beat regularly again reversing administration of 10? (6)" mean?

The wordplay uses an anagram. anagram of RE (synonym="RE") + DRUM (synonym="=beat regularly") = MURDER The answer is MURDER.

Beat regularly again reversing administration of 10? (6)

Independent Cryptic #11615 | 11 Across | 2024-01-02 flower