Go without eyeball having restricted vision, primarily (6)
I believe the answer is:
starve
'go without' is the definition.
(I've seen this before)
'eyeball having restricted vision primarily' is the wordplay.
'eyeball' becomes 'stare' (I've seen this in another clue).
'having restricted' indicates putting letters inside.
'primarily' indicates taking the first letters.
The first letter of 'vision' is 'v'.
'stare' enclosing 'v' is 'STARVE'.
(Other definitions for starve that I've seen before include "Go without food" , "Die from lack of food" , "Suffer from lack of food" , "Die of hunger" , "Stop feeding" .)