Rapture seeing sunset finally passed pool? (9)
I believe the answer is:
transport
'rapture' is the definition.
(I know that rapture can be written as transport)
'sunset finally passed pool?' is the wordplay.
'finally' indicates one should take the final letters.
'passed' becomes 'ran' ('run' can be a synonym of 'pass').
'pool?' becomes 'sport' (pool is a sport).
The last letter of 'sunset' is 't'.
't'+'ran'+'sport'='TRANSPORT'
'seeing' acts as a link.
(Other definitions for transport that I've seen before include "troopship" , "Convey from one place to another" , "Movement (of goods or people)" , "which may be public?" , "Move something or somebody around" .)