Maybe the tower of Pisa’s special property (6,8)
I believe the answer is:
listed building
'maybe the tower of pisa's special property' is the definition.
I can't tell whether this defines the answer.
'the tower of pisa's special property' is the wordplay.
I cannot quite see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
'special' could be 's' (common abbreviation as in Special Air Service) and 's' is found within the answer.
'property' could be 'build' (build is a kind of property) and 'build' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for listed building that I've seen is " Architectural treasure".)