Not clearly visible (13)
I believe the answer is:
inconspicuous
(Other definitions for inconspicuous that I've seen before include "Not easily noticed" , "Camouflaged" , "Unobtrusive" , "Attracting no attention" , "Ordinary" .)
I believe the answer is:
inconspicuous
(Other definitions for inconspicuous that I've seen before include "Not easily noticed" , "Camouflaged" , "Unobtrusive" , "Attracting no attention" , "Ordinary" .)