Disloyal educator muzzling Republican round America (11)
I believe the answer is:
treacherous
'disloyal' is the definition.
(similar in meaning)
'educator muzzling republican round america' is the wordplay.
I cannot quite understand how this works, but
'republican' could be 'r' (abbreviation in US politics) and 'r' is found in the answer.
'educator' could be 'teacher' (teacher is a kind of educator) and 'teacher' is present in the remaining letters.
'round' could be 'o' (o is a circular letter) and 'o' is present in the answer.
'america' could be 'us' (United States) and 'us' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for treacherous that I've seen before include "covered in ice?" , "Ready to betray" , "Unreliable" , "Disloyal and untrustworthy" , "Disloyal; dangerous" .)