What does the cryptic crossword clue "Drains backed up in health resorts (4)" mean?

The definition is "resorts". The wordplay uses a reversal. reverse of SAPS = SPAS; definition: "health resorts" The answer is SPAS.

Drains backed up in health resorts (4)

Times Cryptic #29160 | 25 Down | 2025-02-22 flower