Common eye color (5)
I believe the answer is:
hazel
'common eye color' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hazel that I've seen before include "Cob (nut)" , "Nut-bearing tree" , "Nut-bearing shrub" , "Nut; girl's name" , "Girl" .)