The most common and most likely answer to this crossword clue is the 5 letter word NAURU
I've seen this crossword clue in The Guardian
N
A
U
R
U
More clues leading to the result NAURU
- Island not displaying any aquarium oddly
- Island vessel about to be filled with gold
- Island nation never accepted ultimatum, riling union leaders
- Leading authority losing capital after backing an island nation
- Gold in vase turned up in Pacific Island
- Run around collecting gold somewhere near Hawaii
- Vessel returns, carrying gold for island country
- Small country where a spiritual teacher shaves head after meditation, finally
- North American university game and state
- Beginning to near Australia, unfortunate refugees upset to be incarcerated here
Buddy explains!

The straight part
We know that "Beginning to near Australia, unfortunate refugees upset to be incarcerated here" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case beginning to near australia, unfortunate refugees upset to be incarcerated here = nauru.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.