Mixture, blend (7)
I believe the answer is:
amalgam
I believe this is a double definition.
'mixture' is the first definition.
(amalgam is a kind of mixture)
'blend' is the second definition.
(I've seen this in another clue)
(Other definitions for amalgam that I've seen before include "Ring-bearing hobbit" , "Mixture - alloy of mercury" , "Mercury alloy - combination" , "Mixture of metals" , "Mixture/blend" .)