Mechanically repeat paragraph? Rubbish (6)
I believe the answer is:
parrot
'mechanically repeat' is the definition.
(I've seen this before)
'paragraph? rubbish' is the wordplay.
'paragraph?' becomes 'par' (I can't justify this - if you can you should give a lot more credence to this answer).
'rubbish' becomes 'rot' (both can mean nonsense).
'par'+'rot'='PARROT'
Can you help me to learn more?
(Other definitions for parrot that I've seen before include "Long John Silver's Captain Flint" , "Repeat automatically" , "Mechanically repeat; bird" , "Imitate like tropical bird" , "18's [BIRD]" .)