Rector has upset a big band (9)

I believe the answer is:

orchestra

'a big band' is the definition.

'rector has upset' is the wordplay.
'upset' indicates anagramming the letters.
'rector'+'has'='rectorhas'
'rectorhas' with letters rearranged gives 'ORCHESTRA'.

(Other definitions for orchestra that I've seen before include "Noted performers" , "Carthorse (anag)" , "players in pit" , "Eg, LSO, RPO" , "those who provide the music" .)

I've seen this clue in The Telegraph.

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