City imports drugs (not ecstasy) as a treatment for shaking (1-4)
I believe the answer is:
l-dopa
'treatment for shaking' is the definition.
(drug used to treat Parkinson's disease)
I don't understand the rest of the clue.
(Other definitions for l-dopa that I've seen before include "Drug used to treat Parkinson's disease" , "Pal, do use the drug to treat Parkinson's disease" , "Substance used to treat Parkinson's disease" .)