English radical, following black desire, swaggered (9)
I believe the answer is:
blustered
'swaggered' is the definition.
('bluster' can be a synonym of 'swagger')
'english radical following black desire' is the wordplay.
I cannot quite understand how this works, but
'english' could be 'e' (abbreviation) and 'e' is found within the answer.
'radical' could be 'red' (red can mean a communist) and 'red' is present in the answer.
'black' could be 'b' (as in pencil classifications) and 'b' is present in the answer.
'desire' could be 'lust' (lusting is a kind of desiring) and 'lust' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for blustered that I've seen before include "Blew violently or issued idle threats" , "Talked with empty theats from Ulster bed" , "crew" .)