Wall decoration to stop moving, we hear (6)
I believe the answer is:
frieze
'wall decoration' is the definition.
(architectural feature)
'stop moving we hear' is the wordplay.
'stop moving' becomes 'freeze' (freeze can mean to go still).
'we hear' indicates a 'sounds like' (homophone) clue.
'freeze' is a homophone of 'FRIEZE'.
'to' acts as a link.
(Other definitions for frieze that I've seen before include "Decorated upper part of a wall" , "architectural feature" , "Very greedy eater" , "Heavy fabric" , "Sculptured band between architrave and cornice" .)