Obtain essence (7)
I believe the answer is:
extract
I believe this is a double definition.
'obtain' is the first definition.
(thesaurus)
'essence' is the second definition.
(I've seen this before)
(Other definitions for extract that I've seen before include "Sample of larger work" , "Part" , "Forcibly draw out" , "Pull or take out - maybe a tooth" , "essence" .)