A male I mistake for a female (6)
I believe the answer is:
amelia
'a female' is the definition.
Both the answer and definition are singular nouns.
Maybe you can see a link between them that I can't see?
'a male i mistake' is the wordplay.
'mistake' indicates anagramming the letters.
'male'+'i'='malei'
'malei' with letters rearranged gives 'melia'.
'a'+'melia'='AMELIA'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for amelia that I've seen before include "Fielding novel" , "famous pilot" , "I, a male (anag) - a woman" , "-- Earhart, flyer" , "-- Earhart, aviator" .)