Superior church in outer Derby, or maybe Cornwall (5)
I believe the answer is:
duchy
'maybe cornwall' is the definition.
I can't judge whether this defines the answer.
'superior church in outer derby' is the wordplay.
'superior' becomes 'U' (U can mean upper-class, as in U and non-U speech).
'church' becomes 'ch' (common abbreviation).
'in' indicates putting letters inside.
'outer' says to hollow out the word (remove centre letters).
'derby' with its centre taken out is 'dy'.
'u'+'ch'='uch'
'uch' put into 'dy' is 'DUCHY'.
'or' acts as a link.
Can you help me to learn more?
(Other definitions for duchy that I've seen before include "Dukedom" , "Duke's domain" , "Territory of a nobleman - Cornwall, for instance" , "Cornwall, Lancaster such a territory" , "Duke's territory" .)