Orals set about star (5)
I believe the answer is:
solar
'star' is the definition.
Although both the answer and definition are adjectives, I don't see how they can define each other.
'orals set' is the wordplay.
'set' indicates an anagram (instruction to set the letters).
'orals' is an anagram of 'SOLAR'.
'about' is the link.
Can you help me to learn more?
(Other definitions for solar that I've seen before include "like a star" , "Sort of power" , "Using the sun's energy" , "Of or derived from the sun" , "sunny?" .)