Confusing him, been around large palace (8)
I believe the answer is:
blenheim
'palace' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'confusing him been around large' is the wordplay.
'confusing' is an anagram indicator.
'around' means one lot of letters goes inside another.
'large' becomes 'L' (eg in clothes sizes).
'him'+'been'='himbeen'
'himbeen' anagrammed gives 'benheim'.
'benheim' going around 'l' is 'BLENHEIM'.
Can you help me to learn more?
(Other definitions for blenheim that I've seen before include "Oxfordshire palace; type of spaniel" , "Duke of Marlborough's pile" , "that flew during WW2" , "dog" , "Palace near Oxford" .)