Loose stones coming down on church make a horrible noise (7)
I believe the answer is:
screech
'a horrible noise' is the definition.
(a screech is an unpleasant noise)
'loose stones coming down on church' is the wordplay.
'loose stones coming down' becomes 'scree' (loose stones on a mountain).
'on' says to put letters next to each other.
'church' becomes 'ch' (common abbreviation).
'scree'+'ch'='SCREECH'
'make' acts as a link.
(Other definitions for screech that I've seen before include "Sharp piercing cry" , "Loud shrill cry" , "Raucous sound" , "Squawk" , "Terrifying sound" .)