Helps you see decor nearly finished within (6)
I believe the answer is:
cornea
'helps you' is the definition.
The definition suggests a singular noun which matches the answer.
'decor nearly finished within' is the wordplay.
'within' indicates the answer is hidden within the clue.
'CORNEA' is hidden in the letters of 'decor nearly finished'.
'see' acts as a link.
Can you help me to learn more?
(Other definitions for cornea that I've seen before include "Observer section?" , "Front covering of eye" , "Membrane of the eye" , "Transparent covering of the eye" , "Clear front layer of eye" .)