A quack remedy from which most run (7)
I believe the answer is:
nostrum
'a quack remedy' is the definition.
(I've seen this in another clue)
'which most run' is the wordplay.
'most run' can be anagrammed to 'NOSTRUM'.
But, I am unsure how this is indicated.
'from' is the link.
Can you help me to learn more?
(Other definitions for nostrum that I've seen before include "Must Ron take a quack remedy?" , "Phoney panacea" , "Quack cure" , "Some think it helps" , "Ineffective medical preparation" .)