Pour very weird mixture for supplier (8)
I believe the answer is:
purveyor
'for supplier' is the definition.
(purveyor is a kind of supplier)
'pour very weird' is the wordplay.
'weird' indicates anagramming the letters.
'pour'+'very'='pourvery'
'pourvery' is an anagram of 'PURVEYOR'.
'mixture' is the link.
This may not be correct. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for purveyor that I've seen before include "Provider (of goods)" , "Supplier (of food, etc)" , "Supplier of provisions" , "Retailer" , "Supplier of victuals" .)