He-man's woman? (5)
I believe the answer is:
helen
'woman?' is the definition.
'he-man's' is the wordplay.
'man' becomes 'len' (I've seen this in other clues).
'he'+'len'='HELEN'
(Other definitions for helen that I've seen before include "The Greek army sailed to Troy to get her back" , "Woman abducted to Troy" , "femme fatale" , ""The face the launched 1,000 ships"" , "Ship launcher" .)