Wife to moan about another female (5)
I believe the answer is:
woman
'another female' is the definition.
'woman' can be an answer for 'female' (woman is a kind of female). I am not certain of the 'another' bit.
'wife to moan about' is the wordplay.
'wife' becomes 'w' (abbreviation).
'about' indicates an anagram.
'moan' anagrammed gives 'oman'.
'w'+'oman'='WOMAN'
Can you help me to learn more?
(Other definitions for woman that I've seen before include "Mature female" , "With 1a [NEW] a freedom fighter" , "person not going on stag-night" , "With 1a [OLD], one's rather timid" , "Lady" .)