Saint Catherine's birthplace (5)
I believe the answer is:
siena
'saint catherine's birthplace' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for siena that I've seen before include "somewhere in Italy)" , "City of St Catherine in Tuscany" , "Tuscan town" , "Italian location" , "Italian city strangely in sea" .)