French friend on reduced-salt sausage (6)
I believe the answer is:
salami
'sausage' is the definition.
(I know that Salami is a type of sausage)
'french friend on reduced-salt' is the wordplay.
'french friend' becomes 'ami' (I've seen this before).
'on' is a charade indicator (letters next to each other).
'reduced salt' becomes 'sal' (I've seen this in other clues; 'reduced' asks for an abbreviation).
'ami' after 'sal' is 'SALAMI'.
(Other definitions for salami that I've seen before include "Spiced Italian sausage" , "Highly-spiced sausage" , "Italian sausage (a kind of tactics?)" , "Highly seasoned fatty sausage" , "meat product" .)