Shrub restorative initially banned in most of country (8)
I believe the answer is:
japonica
'shrub' is the definition.
(japonica is a kind of shrub)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for japonica that I've seen before include "Camellia" , "Japanese quince" , "Asian shrub of the rose family, with showy flowers" , "Ornamental shrub" , "plant" .)