Moving one is causing din (5)
I believe the answer is:
noise
'din' is the definition.
(a din is a noisy disturbance)
'moving one is' is the wordplay.
'moving' indicates an anagram (letters are moved around).
'one'+'is'='oneis'
'oneis' is an anagram of 'NOISE'.
'causing' acts as a link.
(Other definitions for noise that I've seen before include "Static - sound" , "Excessive sound" , "Uproar" , "Commotion" , "Unwanted sounds" .)