Continental resort in island by border (6)
I believe the answer is:
rimini
'continental resort' is the definition.
(I know that Rimini is a resort town)
'in island by border' is the wordplay.
'island' becomes 'i' (geographical abbreviation).
'by' means one lot of letters go next to another.
'border' becomes 'rim' (both can mean an edge).
'in'+'i'='ini'
'ini' put after 'rim' is 'RIMINI'.
(Other definitions for rimini that I've seen before include "Italian place" , "North-east Italian Adriatic resort" , "Italian holiday resort" , "Italian coastal city" , "Italian Adriatic port" .)