The most common and most likely answer to this crossword clue is the 7 letter word ANTIGUA
I've seen this crossword clue in The Guardian
A
N
T
I
G
U
A
More clues leading to the result ANTIGUA
- Island against dung? No, no!
- Father Christmas shedding clothes over one summer month upset part of the WI
- Giant turning up gold on WI island
- One island against another? Little time lost
- Island hill dweller keen on the radio
- Island in conflict with island, briefly
- Caribbean island opposed to bird droppings withdrawing objection
- Giant iguana circles island
- Country‘s capital hosting conservation group a month back
- Drivers must repress dodgy gut in island
Buddy explains!
The straight part
We know that "One island" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one island = antigua.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.