Repeat the standard nonsense (6)
I believe the answer is:
parrot
'repeat' is the definition.
(parroting is a kind of repeating)
'the standard nonsense' is the wordplay.
'the standard' becomes 'par' (I've seen this before).
'nonsense' becomes 'rot' (I've seen this before).
'par'+'rot'='PARROT'
(Other definitions for parrot that I've seen before include "Imitative bird" , "Lory" , "Recite" , "Unintelligent imitator" , "Vividly coloured bird" .)