Galileo's birthplace (4)
I believe the answer is:
pisa
'galileo's birthplace' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for pisa that I've seen before include "City in Tuscany" , "Italian city with famous tower" , "much-visited city" , "There's a marked inclination here" , "listed building site" .)