No way to take strong drink — a quack remedy (7)
I believe the answer is:
nostrum
'a quack remedy' is the definition.
(I've seen this before)
'no way to take strong drink' is the wordplay.
'way' becomes 'um' (I can't justify this - if you can you should give a lot more credence to this answer).
'to take' means one lot of letters go next to another.
'strong' becomes 'str' (abbreviation for strong).
'drink' is an insertion indicator.
'no'+'um'='noum'
'noum' enclosing 'str' is 'NOSTRUM'.
Can you help me to learn more?
(Other definitions for nostrum that I've seen before include "Quack cure" , "Ineffective medical preparation" , "Quack remedy or pet scheme" , "Quack medicine - run most (anag)" , "Must Ron take a quack remedy?" .)