Chap is to walk with female (7)
I believe the answer is:
Here is my best explanation:
'chap' is the definition.
(stephen is a male name)
'walk with female' is the subsidiary indication.
'walk' becomes 'step' (I've seen this before**).
'with' is a charade indicator (letters next to each other).
'female' becomes 'hen' (hen is a kind of female).
'is to' is the link.
(Other definitions for stephen that I've seen before include "-- Hawking (A Brief History of Time)", "-- Hawking, English physicist", "Boy", "First Christian martyr", "Male", "He's commemorated on December 26th", "Old king", "Man", "-- King, US horror writer" and "Author of The Shining".)