With yellow and white, say, grey void (4)
I believe the answer is:
eggy
'with yellow' is the definition.
'eggy' can be an answer for 'yellow' (I've seen this before). I am not certain of the 'with' bit.
'white say grey void' is the wordplay.
'white say' becomes 'eg' (both can mean for example. I am not sure about the 'white' bit.).
'void' suggests removing the centre (the word is empty or void of its inside letters).
'grey' with its middle removed is 'gy'.
'eg'+'gy'='EGGY'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for eggy that I've seen before include "Yolky?" , "Like part of breakfast" , "like soldiers retreating from shells?" , "Like an omelette" , "with a sulphurous niff?" .)