Danger host represented, being self-willed (10)
I believe the answer is:
headstrong
'self-willed' is the definition.
(I know that self-willed can be written as headstrong)
'danger host represented' is the wordplay.
'represented' is an anagram indicator.
'danger'+'host'='dangerhost'
'dangerhost' with letters rearranged gives 'HEADSTRONG'.
'being' acts as a link.
(Other definitions for headstrong that I've seen before include "pig-headed" , "Obstinately rash" , "Wilfully determined" , "Wilful, determined" , "strong-willed" .)