Our sun (3)
I believe the answer is:
sol
'our sun' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sol that I've seen before include "Peruvian currency; Roman sun god" , "Note - colloid - the Sun" , "nearby star" , "The sun in 12 Across" , "The sun in Spain" .)