The sense to appreciate the prospects (5)
I believe the answer is:
sight
'the sense' is the definition.
(sight or vision is a sense)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for sight that I've seen before include "Glimpse" , "Spot - eyesore" , "View" , "Sense" , "something to behold" .)