Repeat usual rubbish (6)
I believe the answer is:
parrot
'repeat' is the definition.
(parroting is a kind of repeating)
'usual rubbish' is the wordplay.
'usual' becomes 'par'.
'rubbish' becomes 'rot' (I've seen this before).
'par'+'rot'='PARROT'
(Other definitions for parrot that I've seen before include "Repeat automatically" , "Repeat by rote" , "Squawking bird" , "Spout" , "Brightly coloured tropical bird" .)