It may need a jack up before being repaired (7)
I believe the answer is:
steeple
'it may need a jack up before being repaired' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for steeple that I've seen before include "Pointed structure" , "point" , "Sort of chase" , "Jack up this?" , "Tall building" .)