Captive in luminary, Aristotle, say? (9)
I believe the answer is:
shipowner
'aristotle say?' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'captive in luminary' is the wordplay.
'captive' becomes 'POW' (prisoner of war).
'in' is an insertion indicator.
'luminary' becomes 'shiner' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'pow' placed into 'shiner' is 'SHIPOWNER'.
Can you help me to learn more?
(Other definitions for shipowner that I've seen before include "Crafty proprietor" , "I've secured brig" , "man over the line" , "Onassis, say" .)