Steeple topper (5)
I believe the answer is:
spire
'steeple topper' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for spire that I've seen before include "Church steeple" , "Tall pointed structure as on church or in O'Connell St." , "Church feature visible from a distance" , "Piers (anag.)" , "Pointed church tower" .)