What does the cryptic crossword clue "The oaf inside many a hoodlum (5)" mean?

The definition is "hoodlum". The wordplay uses a hidden word. Hidden in "the oaf inside manY A HOOdlum" The answer is YAHOO.

The oaf inside many a hoodlum (5)

Independent Cryptic #11909 | 12 Across | 2024-12-10 flower