Woman I complain about (5)
I believe the answer is:
naomi
'woman' is the definition.
'i complain about' is the wordplay.
'complain' becomes 'moan' (moan can mean to complain or whinge).
'about' says the letters should be written backwards.
'i'+'moan'='imoan'
'imoan' written backwards gives 'NAOMI'.
(Other definitions for naomi that I've seen before include "woman's name" , "- - Campbell, supermodel" , "mother- in-law" , "Girl's name, meaning "pleasant"" , "Relative of Ruth" .)