Mocking racist leaders from abroad in live broadcast (9)
I believe the answer is:
satirical
'mocking' is the definition.
(I've seen this before)
'racist leaders from abroad in live broadcast' is the wordplay.
'leaders from' says to take the initial letters.
'broadcast' indicates anagramming the letters.
The first letters of 'abroad in live' is 'ail'.
'racist'+'ail'='racistail'
'racistail' with letters rearranged gives 'SATIRICAL'.
(Other definitions for satirical that I've seen before include "taunting?" , "Describing irreverent humour" , "Ironic - sarcastic" , "Ridiculing" , "Exposing human folly to ridicule" .)