Total attendance after George gets in terrible rage (9)
I believe the answer is:
aggregate
'total' is the definition.
('aggregate' can be a synonym of 'total')
'attendance after george gets in terrible rage' is the wordplay.
'attendance' becomes 'gate' (I've seen this before).
'after' means one lot of letters go next to another.
'george' becomes 'g'.
'gets in' is an insertion indicator.
'terrible' indicates an anagram.
'rage' is an anagram of 'agre'.
'g' inserted within 'agre' is 'aggre'.
'gate' put after 'aggre' is 'AGGREGATE'.
(Other definitions for aggregate that I've seen before include "Collected" , "The whole amount" , "A whole formed by combining several elements" , "Material mixed with cement to form concrete" , "Material to make concrete, mortar, or plaster" .)