African Christian’s missing start of vision (5)
I believe the answer is:
optic
'of vision' is the definition.
(I've seen this in another clue)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for optic that I've seen before include "Eye - spirit measure" , "Teacher's maybe coming through this" , "affecting vision?" , "Ocular" , "bar assistant" .)