“The colours,” you storm, “are glaring” (8)

I believe the answer is:

flagrant

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

'the colours you storm' is the wordplay.
'the colours' becomes 'flag' (I've seen this before).
'you storm' becomes 'rant' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'flag'+'rant'='FLAGRANT'

Can you help me to learn more?

(Other definitions for flagrant that I've seen before include "Crying" , "Conspicuous, blatant" , "Openly outrageous" , "'Conspicuous, glaring (8)'" , "Unashamed" .)

I've seen this clue in the Evening Standard.

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