Spot worth seeing? (5)
I believe the answer is:
sight
This might be a double definition.
'spot' is the first definition.
(both can mean to notice or observe)
'worth seeing?' is the second definition.
'sight' can be an answer for 'seeing?' (seeing is a kind of sight). I'm not sure about the 'worth' bit.
Can you help me to learn more?
(Other definitions for sight that I've seen before include "Place worth visiting" , "Looking" , "Observe" , "something to behold" , "Range of vision" .)