All said visit Rome (4,3)
I believe the answer is:
holy see
'rome' is the definition.
(I've seen this before)
'all said visit' is the wordplay.
'all said' becomes 'holy' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'visit' becomes 'see' (seeing is a kind of visiting).
'holy'+'see'='HOLY SEE'
Can you help me to learn more?
(Other definitions for holy see that I've seen before include "palace in Rome" , "Pope's bishopric" , "The Papal Court or government in Rome" , "Church court" , "Jurisdiction of the Pope" .)