Medic sacked following record international outbreak (8)
I believe the answer is:
epidemic
'outbreak' is the definition.
(I've seen this before)
'medic sacked following record international' is the wordplay.
'sacked' is an anagram indicator.
'following' says to put letters next to each other.
'record' becomes 'ep'.
'international' becomes 'i' (abbreviation eg in IMF).
'medic' with letters rearranged gives 'demic'.
'ep'+'i'='epi'
'demic' put after 'epi' is 'EPIDEMIC'.
(Other definitions for epidemic that I've seen before include "Unfortunately widespread" , "eruption" , "Prevalent disease" , "Widespread outbreak of an infectious disease" , "Plague" .)