Brought in from anchorage in one sea (8)
I believe the answer is:
imported
'brought in' is the definition.
(I've seen this in another clue)
'anchorage in one sea' is the wordplay.
'anchorage' becomes 'port' (I've seen this before).
'in' is an insertion indicator.
'one' becomes 'i' (Roman numeral).
'sea' becomes 'med' (short for Mediterranean).
'i'+'med'='imed'
'port' put inside 'imed' is 'IMPORTED'.
'from' acts as a link.
(Other definitions for imported that I've seen before include "Brought in; meant" , "brought home" , "Brought in merchandise from abroad" .)