Trouble about British workers forming corporation (7)
I believe the answer is:
abdomen
'corporation' is the definition.
(thesaurus)
'trouble about british workers' is the wordplay.
'trouble' becomes 'ado' (I've seen this before).
'about' means one lot of letters goes inside another.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'workers' becomes 'men' (man is a kind of worker).
'ado' going around 'b' is 'abdo'.
'abdo'+'men'='ABDOMEN'
'forming' acts as a link.
(Other definitions for abdomen that I've seen before include "corporation's site" , "Tummy" , "guts" , "Central region" , "Site of corporation" .)