Repeat standard codswallop (6)
I believe the answer is:
parrot
'repeat' is the definition.
(parroting is a kind of repeating)
'standard codswallop' is the wordplay.
'standard' becomes 'par' (I've seen this before).
'codswallop' becomes 'rot' (I've seen this before).
'par'+'rot'='PARROT'
(Other definitions for parrot that I've seen before include "Lory" , "Repeat automatically" , "Mimic like exotic bird" , "Tropical bird, may talk" , "Amazon" .)