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' acts as a 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?" .)