### Clue: Saturn's fifth with reduced warmth? (4)
### Answer: RHEA 
 ### Explanation: Definition: Saturn's fifth
 **The 5th letter of**(…'s fifth) "Saturn" **plus**(with) "heat"(warmth) **minus its last letter **(reduced …).
Defn: Also known as Saturn V, one of Saturn's moons,which would not have much warmth. A WIWD (wordplay intertwined with definition) clue.
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