Bunch of new-borns in straw bed (6)
I believe the answer is:
litter
'bunch' is the definition.
(thesaurus)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for litter that I've seen before include "Number of young animals born at one time" , "Carelessly-dropped rubbish" , "mess around?" , "Rubbish - baby animals" , "Refuse - to give birth" .)