Remedy in no way unusual (7)
I believe the answer is:
nostrum
'remedy' is the definition.
(nostrum is a kind of remedy)
'no way unusual' is the wordplay.
'way' becomes 'st'.
'unusual' becomes 'rum' (I've seen this before).
'no'+'st'+'rum'='NOSTRUM'
'in' acts as a link.
(Other definitions for nostrum that I've seen before include "Quack cure" , "answer to all problems!" , "our Latin" , "Quack remedy or pet scheme" , "Phoney panacea" .)