Soaked in the deepest concoction (7)
I believe the answer is:
steeped
'soaked' is the definition.
(steeping is a kind of soaking)
'deepest concoction' is the wordplay.
'concoction' indicates an anagram.
'deepest' with letters rearranged gives 'STEEPED'.
'in the' acts as a link.
(Other definitions for steeped that I've seen before include "Soaked in water" , "Saturated or let sit in a liquid" , "Soaked in liquid" , "wet" .)