Get the picture that's abstract (4)
I believe the answer is:
take
I believe this is a double definition.
'get the picture' is the first definition.
(thesaurus)
'abstract' is the second definition.
(thesaurus)
'that's' acts as a link.
(Other definitions for take that I've seen before include "Approach" , "Procure" , "Endure; single recording" , "Teak (anag.)" , "Perspective" .)