Unable to see in the shade (5)
I believe the answer is:
blind
I believe this is a double definition.
'unable to see' is the first definition.
(I've seen this before)
'the shade' is the second definition.
(I've seen this before)
'in' acts as a link.
(Other definitions for blind that I've seen before include "relying on instruments" , "Unable to observe" , "Unable to see - screen" , "cover-up" , "Failing to see" .)