Tall towers tapering to a point (8)
I believe the answer is:
steeples
'tall towers tapering to a point' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for steeples that I've seen before include "Tall church towers" , "Jack can climb them" , "Lee steps up on churches" , "Tall towers tapering to a point" , "Towers with spires on church roofs" .)