Convenient for Hungary's borders (5)

I believe the answer is:

handy

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'convenient' is the definition.
(synonyms)

'hungary's borders' is the wordplay.
'hungary' becomes 'H' (abbreviation used in vehicle registration codes).
'borders' becomes 'andy' (I can't justify this - if you can you should give a lot more credence to this answer).
'h'+'andy'='HANDY'

'for' acts as a link.

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(Other definitions for handy that I've seen before include "Useful and convenient" , "Useful - competent" , "Useful - within reach" , "Accessible" , "Dexterous" .)

I've seen this clue in The Globe and Mail and The Guardian.

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