Line-up so worried about Times sacking? (9)
I believe the answer is:
expulsion
'sacking?' is the definition.
(thesaurus)
'line-up so worried about times' is the wordplay.
'line-up' becomes 'lineup' ('lineup' can be a synonym of 'line-up').
'worried' is an anagram indicator.
'about' is an insertion indicator.
'times' becomes 'x' (multiplication sign).
'lineup'+'so'='lineupso'
'lineupso' is an anagram of 'epulsion'.
'epulsion' going around 'x' is 'EXPULSION'.
(Other definitions for expulsion that I've seen before include "Action of forcing out" , "Removal, as from school" .)