Port kept in oak, as originally recalled (5)
I believe the answer is:
osaka
'port' is the definition.
(I've seen this before)
'in oak as originally recalled' is the wordplay.
'in' indicates a hidden word.
'recalled' says the letters should be written backwards (to recall can mean to bring something back).
'akaso' is hidden within 'oak as originally'.
'akaso' reversed gives 'OSAKA'.
'kept' is the link.
(Other definitions for osaka that I've seen before include "Place" , "Port city on Honshu, Japan" , "Major port and commercial and industrial centre on Honshu" , "Japan's third-largest city" , "Third largest city in Japan" .)