The girl with whom I am going back home (6)
I believe the answer is:
maiden
'the girl' is the definition.
(maiden is a kind of girl)
'i am going back home' is the wordplay.
'going back' shows that the letters should be reversed in order.
'home' becomes 'den' (I've seen this before).
'i'+'am'='iam'
'iam' written backwards gives 'mai'.
'mai'+'den'='MAIDEN'
'with whom' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for maiden that I've seen before include "See 3" , "No runs are scored from this - young girl" , "Unmarried girl of old" , "Ship's first trip" , "Damsel" .)