Delivery recipient must pay for port fees, unfortunately (8)
I believe the answer is:
freepost
'delivery recipient must pay' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'port fees unfortunately' is the wordplay.
'unfortunately' indicates an anagram (a bad or unfortunate spelling).
'port'+'fees'='portfees'
'portfees' with letters rearranged gives 'FREEPOST'.
'for' is the link.
Can you help me to learn more?
(Other definitions for freepost that I've seen before include "No stamp needed here" , "mail service" .)