Where to come when you make a hit with the girl (6)
I believe the answer is:
hither
'where to come when you' is the definition.
The definition suggests a singular noun but the answer is not.
'a hit with the girl' is the wordplay.
'with' says to put letters next to each other.
'the girl' becomes 'her' ('her' refers to a girl or woman).
'hit'+'her'='HITHER'
'make' is the link.
Can you help me to learn more?
(Other definitions for hither that I've seen before include "so far" , "Hit her, being towards this place" , "all over the place - 13a,25a,16d,15d" , "To this place of old" , "Formally, towards this place" .)