Guess how bus in Essex incorporates entertainment (4,8)

I believe the answer is:

show business

'entertainment' is the definition.
(I've seen this before)

'guess how bus in essex incorporates' is the wordplay.
'incorporates' says the answer is hidden in the clue.
'SHOW-BUSINESS' is hidden in the letters of 'guess how bus in essex'.

(Other definitions for show business that I've seen before include "Entertainment industry" , "The world of entertainment" , "Theatre/music industry" .)

I've seen this clue in The Telegraph.

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