Number accepting verbal confirmation of vision (8)
I believe the answer is:
eyesight
'vision' is the definition.
(eyesight is your vision)
'number accepting verbal confirmation' is the wordplay.
'number' becomes 'eight' (eight is a kind of whole number).
'accepting' is an insertion indicator (inserted letters are accepted).
'verbal confirmation' becomes 'yes' (I've seen this in another clue. I am not sure about the 'verbal' bit.).
'eight' placed around 'yes' is 'EYESIGHT'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for eyesight that I've seen before include "perception" , "quality of viewing" , "Perceptive faculty" , "Purpose of certain organs" , "Faculty of vision" .)