Lord of Bolton? (5)
I believe the answer is:
baron
This might be a double definition.
'lord' is the first definition.
(baron is a kind of lord)
'bolton?' is the second definition.
Both the answer and definition are singular nouns.
Perhaps you can see an association between them that I can't see?
'of' acts as a link.
Can you help me to learn more?
(Other definitions for baron that I've seen before include "Husband" , "Lowest rank of British nobility" , "Powerful financier" , "captain of industry" , "Minor peer" .)