Doctrine about Caesar, oddly not shown in sculptor's work (3,6)
I believe the answer is:
bas relief
'sculptor's work' is the definition.
'bas relief' can be an answer for 'work' (I have seen 'work of art' mean 'bas relief' so perhaps 'work' could also mean 'bas relief'). I am not sure about the 'sculptor's' bit.
'doctrine about caesar oddly not shown' is the wordplay.
'doctrine' becomes 'belief' (belief is a kind of doctrine).
'about' indicates putting letters inside.
'oddly not shown' indicates alternate letters (letters in odd-numbered positions removed).
The alternate letters of 'caesar' are 'asr'.
'belief' placed around 'asr' is 'BAS-RELIEF'.
'in' is the link.
Can you help me to learn more?
(Other definitions for bas relief that I've seen before include "work of art" , "Sculpture" , "less outstanding work" , "Moore may have produced this" , "projected figure" .)