Old coins marketed by Italians primarily (5)
I believe the answer is:
soldi
'old coins' is the definition.
(plural of soldo, old Italian coin)
'marketed by italians primarily' is the wordplay.
'marketed' becomes 'sold' (I've seen this in another clue).
'by' says to put letters next to each other.
'primarily' says to take the initial letters.
The first letter of 'italians' is 'i'.
'sold'+'i'='SOLDI'
(Other definitions for soldi that I've seen before include "Old Italian coins" , "old money" .)