Prince Andrew, perhaps, probed by northern state (10)
I believe the answer is:
queensland
'prince andrew perhaps probed' is the definition.
I can't judge whether this definition defines the answer.
'northern state' is the wordplay.
'northern' becomes 'queens' (I can't justify this - if you can you should give a lot more credence to this answer).
'state' becomes 'land' (synonyms).
'queens'+'land'='QUEENSLAND'
'by' is the link.
Can you help me to learn more?
(Other definitions for queensland that I've seen before include "Australian state" , "NE state of Australia" , "Australian territory" , "part of Australia" .)