Oriental state plant admits pressure can be stimulating (8)
I believe the answer is:
espresso
'be stimulating' is the definition.
I can't tell whether this definition defines the answer.
'oriental state plant admits pressure' is the wordplay.
'oriental state plant' becomes 'eso' (I am not sure about this - if you are sure you should believe this answer much more).
'admits' means one lot of letters goes inside another.
'pressure' becomes 'press' ('press' can be a synonym of 'pressure').
'eso' going around 'press' is 'ESPRESSO'.
'can' is the link.
Can you help me to learn more?
(Other definitions for espresso that I've seen before include "Strong black coffee" , "Type of coffee" , "It's made by forcing steam through ground coffee beans" , "Drinks machine" , "Kind of shot" .)