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Isolated, practically abuse a Republican (7)

Ross

I believe the answer is:

insular

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'isolated' is the definition.
(thesaurus)

'practically abuse a republican' is the wordplay.
'practically' means to remove the last letter.
'abuse' becomes 'insult' ('insult' can be a synonym of 'abuse').
'a republican' becomes 'ar' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'insult' with its last letter taken off is 'insul'.
'insul'+'ar'='INSULAR'

Can you help me to learn more?

(Other definitions for insular that I've seen before include "Lacking contact with other people" , "Inward-looking" , "Parochial" , "Lacking contact with others" , "Detached from mainstream" .)

I've seen this clue in The Telegraph.
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