What does the cryptic crossword clue "Lush exterior of diaphanous resins (6)" mean?

The wordplay uses charade, parts. ALKY (synonym of "Lush") + DS (middle of "diaphanous resins") [outer letters: "exterior"] The answer is ALKYDS.

Lush exterior of diaphanous resins (6)

Guardian Cryptic #29580 | 6 Across | 2025-01-01 flower