Seoul reportedly hosts games in public (6)
I believe the answer is:
openly
'in public' is the definition.
(I've seen this in another clue)
'seoul reportedly hosts games' is the wordplay.
'seoul reportedly' becomes 'only' (I can't explain this - if you can you should believe this answer much more).
'hosts' means one lot of letters goes inside another (inserted letters are welcomed or hosted).
'games' becomes 'PE' (abbreviation for Physical Education).
'only' going around 'pe' is 'OPENLY'.
Can you help me to learn more?
(Other definitions for openly that I've seen before include "In public" , "In an overt way" , "Candidly, without concealment." , "Overtly" , "Without concealment, frankly" .)