Church tower (7)
I believe the answer is:
steeple
'church tower' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for steeple that I've seen before include "Tall building" , "Pointed church tower" , "Tall tower with spire on top of church" , "Pet eels (anag)" , "that the church may be under" .)