Where some go mainly to introduce daughter and dashing chap (6)
I believe the answer is:
laddie
'dashing chap' is the definition.
(laddie can mean a young man)
'where some go mainly to introduce daughter' is the wordplay.
'where some go' becomes 'ladies' (as in the ladies toilet, somewhere to 'go').
'mainly' means to remove the last letter.
'to introduce' indicates putting letters inside (to introduce to can mean to insert or include).
'daughter' becomes 'd'.
'ladies' with its last letter removed is 'ladie'.
'ladie' enclosing 'd' is 'LADDIE'.
'and' is the link.
(Other definitions for laddie that I've seen before include "Sonny" , "Child" , "Scottish boy" , "Youngster" , "(Scots) boy" .)