Affair in Australia is ongoing (7)
I believe the answer is:
liaison
'affair' is the definition.
('liaison' can be a synonym of 'affair')
'in australia is ongoing' is the wordplay.
'in' indicates a hidden word.
'LIAISON' is hidden in the letters of 'australia is ongoing'.
(Other definitions for liaison that I've seen before include "Mediator" , "Cooperation between people or organisations" , "Association" , "Mil. coordination; illicit affair" , "Communication; relationship" .)