Male gender, partially a myth? (6)
I believe the answer is:
legend
'a myth?' is the definition.
(I've seen this before)
'male gender partially' is the wordplay.
'partially' indicates the answer is hidden within the clue.
'LEGEND' is hidden within 'male gender'.
(Other definitions for legend that I've seen before include "hero" , "Saga" , "Story about mytical beings" , "Fabulous tale" , "Story of mythical beings or events" .)