One danced around hawthorn tree with E European (7)
I believe the answer is:
maypole
'one danced around hawthorn tree' is the definition.
I can't judge whether this definition defines the answer.
'with e european' is the wordplay.
'with' says to put letters next to each other.
'e' becomes 'may' (I can't justify this - if you can you should believe this answer much more).
'european' becomes 'pole' (Pole is an example).
'may' put next to 'pole' is 'MAYPOLE'.
Can you help me to learn more?
(Other definitions for maypole that I've seen before include "Structure danced around in spring" , "at centre of dancing" , "Focus of spring dance" , "It's danced round with ribbons" , "Something danced round" .)