What does the cryptic crossword clue "Beneficiary seen entering castle gate eagerly (7)" mean?

The definition is "Beneficiary". The wordplay uses a hidden word. Hidden (‘seen entering’) in castLE GATE Eagerly The answer is LEGATEE.

Beneficiary seen entering castle gate eagerly (7)

Independent Cryptic #11928 | 7 Down | 2025-01-01 flower