What does the cryptic crossword clue "A place in the heavens for next to win, say (6)" mean?

The wordplay uses a charade (building blocks). SAT (synonym="‘next’") + URN (synonym="URN") = SATURN The answer is SATURN.

A place in the heavens for next to win, say (6)

Guardian Cryptic #29565 | 25 Across | 2024-12-13 flower