Radical outed American devoted to his job? (7)

I believe the answer is:

duteous

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'devoted to his job?' is the definition.
The definition suggests a singular noun but the answer is not.

'radical outed american' is the wordplay.
'radical' is an anagram indicator.
'american' becomes 'us' (abbreviation for United States).
'outed' anagrammed gives 'duteo'.
'duteo'+'us'='DUTEOUS'

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(Other definitions for duteous that I've seen before include "Conscientious" , "Dutiful (archaic)" , "Attentive to obligations" , "Devoted" , "Obedient" .)

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