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' (short for 'exempli gratia', 'for example' in Latin).
'affected' indicates anagramming the letters.
'weight' is an anagram of 'gwhite'.
'eg'+'gwhite'='EGG-WHITE'
'for' is the link.
(Other definitions for egg white that I've seen before include "Meringue ingredient" , "Albumen, transparent ovum content" , "Cake ingredient" , "Albumen, not the yolk" .)