Chosen people get odd mixture of gold and silver (8)
I believe the answer is:
Here is my best explanation:
'mixture of gold and silver' is the definition.
(electrum is an alloy of gold and silver)
'chosen people get odd' is the wordplay.
'chosen people' becomes 'elect'.
'get' means one lot of letters go next to another.
'odd' becomes 'rum' (I've seen this before).