Wanness (6)
I believe the answer is:
pallor
'wanness' is the definition.
(I know that wanness can be written as pallor)
This is all the clue.
(Other definitions for pallor that I've seen before include "Paleness of complexion" , "Unhealthy whiteness" , "White complexion" , "Ashen complexion due to illness" , "Whiteness of face as from illness" .)