Having higher standard, Dior heads off, excitedly, to sup with the Queen (8)
I believe the answer is:
superior
'having higher standard' is the definition.
I can't tell whether this defines the answer.
'dior heads off excitedly to sup with the queen' is the wordplay.
'heads off' means to remove the first letter.
'excitedly' indicates an anagram.
'to' says to put letters next to each other (I've seen this in other clues).
'sup with' becomes 'supe' (I can't justify this - if you can you should believe this answer much more).
'the queen' becomes 'r' (abbreviation for regina, e.g. in ER ).
'dior' with its initial letter taken away is 'ior'.
'ior' with letters rearranged gives 'rio'.
'rio' put after 'supe' is 'superio'.
'superio'+'r'='SUPERIOR'
Can you help me to learn more?
(Other definitions for superior that I've seen before include "A Great Lake; better" , "Higher in status" , "Higher ranking" , "The largest of the Great Lakes" , "Haughty" .)