Worth changing new deliveries that are abandoned (6,4)

'are abandoned' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'worth changing new deliveries' is the wordplay.
I cannot really see how this works, but
an anagram of 'worth' is 'throw' which is located in the answer.
'new' could be 'n' (common abbreviation eg NT for New Testament) and 'n' is found within the answer.
'deliveries' could be 'over' (I've seen this before) and 'over' is present in the answer.
No letters remain.
This explanation may well be incorrect...

'that' is the link.

Can you help me to learn more?