What does the cryptic crossword clue "Relative featured in masterpiece I nailed up (5)" mean?

The definition is "Relative". The wordplay uses a hidden word. Hidden reversed in "relative featured in masterpiECE I Nailed up" The answer is NIECE.

Relative featured in masterpiece I nailed up (5)

Guardian Cryptic #29652 | 6 Down | 2025-03-26 flower