What does the cryptic crossword clue "Is that concealed by instrumental entertainer? (6,6)" mean?

The wordplay uses a hidden word. HIDDEN (synonym="HIDDEN") + TAL (synonym="TAL") + ENT (synonym="ENT") = HIDDENTALENT The answer is HIDDENTALENT.

Is that concealed by instrumental entertainer? (6,6)

Guardian Cryptic #29563 | 20 Across | 2024-12-11 flower