Sporting event elegant and arty, he gathered (6,7)
I believe the answer is:
henley regatta
'sporting event' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'elegant and arty he gathered' is the wordplay.
'and' means one lot of letters go next to another.
'gathered' indicates anagramming the letters (the letters are gathered into a new order).
'arty'+'he'='artyhe'
'elegant' after 'artyhe' is 'artyheelegant'.
'artyheelegant' is an anagram of 'HENLEY REGATTA'.
Can you help me to learn more?
(Other definitions for henley regatta that I've seen before include "Thames rowing festival" , "Annual rowing event on the Thames" , "Sporting festival" , "The UK's poshest annual rowing event" .)