### Clue: Not a natural place to bathe, or sail off with a flipping Greek character (8)
### Answer: SOLARIUM 
 ### Explanation: Definition: Not a natural place to bathe
A charade of SOLARI, an anagram ('off') of 'or sail') plus UM, a reversal ('flipping') of MU ('Greek character'). The 'bathing' would be sun-bathing.