Is much excited by total theatre (5,4)
I believe the answer is:
music hall
'theatre' is the definition.
(music hall is a kind of theatre)
'is much excited by total' is the wordplay.
'excited' indicates an anagram.
'by' means one lot of letters go next to another.
'total' becomes 'all' (I've seen this before).
'is'+'much'='ismuch'
'ismuch' with letters rearranged gives 'musich'.
'musich'+'all'='MUSIC-HALL'
(Other definitions for music hall that I've seen before include "A place for variety" , "Mainly C 19 variety entertainment" , "theatre of a sort" , "Late 19th century entertainment, and the theatre it took place in" , "Vaudeville" .)