In the finish I get the girl (4)
I believe the answer is:
enid
'the girl' is the definition.
'in the finish i' is the wordplay.
'in' means one lot of letters goes inside another.
'the finish' becomes 'end' (I've seen this before).
'end' placed around 'i' is 'ENID'.
'get' is the link.
(Other definitions for enid that I've seen before include "Geraint's loved one" , "Dine out on this girl's name also" , "Writer of children's books, d. 1968" , "& 18 Down Children's author" , "Lady" .)