It's perfect for meringue, for example, and for shifting weight (3,5)
I believe the answer is:
egg white
'it's perfect for meringue' is the definition.
I can't judge whether this defines the answer.
'example and for shifting weight' is the wordplay.
I cannot quite see how this works, but
'example' could be 'eg' (short for 'exempli gratia', 'for example' in Latin) and 'eg' is found within the answer.
an anagram of 'weight' is 'gwhite' which is located in the answer.
No letters remain.
This explanation may well be incorrect...
'for' is the link.
Can you help me to learn more?
(Other definitions for egg white that I've seen before include "Albumen, not the yolk" , "Albumen, transparent ovum content" , "Cake ingredient" , "Meringue ingredient" .)