Wrong answer, with Epsom initially entered for 'horse-racing town' (5)
I believe the answer is:
siena
'town' is the definition.
(I have seen 'Tuscan town ' mean 'siena' so perhaps 'town' could also mean 'siena')
'wrong answer with epsom initially entered' is the wordplay.
'wrong' becomes 'sin' (wrong can mean a sin or crime).
'answer' becomes 'a' (abbreviation eg in Q and A).
'with' is a charade indicator (letters next to each other).
'initially' indicates taking the first letters.
'entered' indicates putting letters inside.
The first letter of 'epsom' is 'e'.
'sin'+'a'='sina'
'sina' going around 'e' is 'SIENA'.
'for horse-racing' acts as a 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 siena that I've seen before include "Walled city of Tuscany" , "Tuscan city" , "Italian city strangely in sea" , "somewhere in Italy)" , "City of St Catherine in Tuscany" .)