Meringue ingredient for example affected weight (3,5)
I believe the answer is:
egg white
'meringue ingredient' is the definition.
(I've seen this before)
'example affected weight' is the wordplay.
'example' becomes 'eg'.
'affected' indicates an anagram.
'weight' anagrammed gives 'gwhite'.
'eg'+'gwhite'='EGG-WHITE'
'for' acts as a link.
(Other definitions for egg white that I've seen before include "Meringue ingredient" , "Albumen, transparent ovum content" , "Cake ingredient" , "Albumen, not the yolk" .)