What does the cryptic crossword clue "'House full': getting out of it is beneficial (6)" mean?

The definition is "beneficial". The wordplay uses a hidden word. Hidden in "'hoUSE FULl': getting out of it is beneficial" The answer is USEFUL.

'House full': getting out of it is beneficial (6)

Guardian Cryptic #29097 | 4 Across | 2023-06-15 flower