The most common and most likely answer to this crossword clue is the 4 plus 3 letter word ROSS SEA
I've seen this crossword clue in The Guardian
R
O
S
S
S
E
A
More clues leading to the result ROSS SEA
- Egg that’s taken in three seconds with a very cold drink
- Head off angry tailless marine mammal here perhaps?
- Antarctic location — Diana needs drink!
- Primarily, remote oceanic section, some skirting East Antarctica?
- Extremely large arses kicked round part of Antarctica
- Icy water swelled around ship first of all
- Artist captures old ship going south-east in very cold water
Buddy explains!
The straight part
We know that "part of Antarctica" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case part of antarctica = ross sea.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.