Irish broadcaster covering international ceremony (4)
I believe the answer is:
rite
'ceremony' is the definition.
(rite is a kind of ceremony)
'irish broadcaster covering international' is the wordplay.
'irish broadcaster' becomes 'RTE' (national broadcaster of Ireland).
'covering' indicates putting letters inside.
'international' becomes 'i' (abbreviation eg in IMF).
'rte' placed around 'i' is 'RITE'.
(Other definitions for rite that I've seen before include "Tire of ceremony" , "(Words used in) ceremonial" , "Solemn ceremony" , "form of service" , "(Words for) ceremony" .)