### Clue: What Syrinx refused to do, but Selene did, in hospital vessel (6)
### Answer: BEDPAN 
 ### Explanation: Definition: hospital vessel
In Greek mythology, Syrinx was amorously pursued by Pan, but was transformed into hollow reeds before he could catch her. On the other hand, Pan was one of Selene's lovers, so she was happy to BED PAN