Barely detectable (5)
I believe the answer is:
faint
(Other definitions for faint that I've seen before include "Hard to see" , "Swoon, pass out" , "(Of a chance) slight" , "Weak" , "Swoon - pale" .)
I believe the answer is:
faint
(Other definitions for faint that I've seen before include "Hard to see" , "Swoon, pass out" , "(Of a chance) slight" , "Weak" , "Swoon - pale" .)