Brian and I arranged to import brown sort of metal (9)
I believe the answer is:
britannia
'sort of metal' is the definition.
'brian and i arranged to import brown' is the wordplay.
'and' is a charade indicator (letters next to each other) (I've seen this in other clues).
'arranged' indicates anagramming the letters.
'to import' indicates putting letters inside.
'brown' becomes 'tan' (tan is a kind of brown).
'brian' put after 'i' is 'ibrian'.
'ibrian' anagrammed gives 'brinia'.
'brinia' enclosing 'tan' is 'BRITANNIA'.
(Other definitions for britannia that I've seen before include "She who musically rules the waves" , "Warrior personifying Great Britain" , "Great Britain personified" , "Female personification of main UK island" , "Former Royal yacht" .)