Troublesome British trade union is condemned (13)

I believe the answer is:

insubordinate

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'troublesome' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?

'british trade union is condemned' is the wordplay.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'condemned' indicates anagramming the letters.
'b'+'trade'+'union'+'is'='btradeunionis'
'btradeunionis' anagrammed gives 'INSUBORDINATE'.

Can you help me to learn more?

(Other definitions for insubordinate that I've seen before include "Rebellious" , "Mutinous" , "Defiant of authority" , "Not submissive to authority" , "Disobedient" .)

I've seen this clue in The Times.

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