The most common and most likely answer to this crossword clue is the 5 plus 3 letter word BLACK SEA
I've seen this crossword clue in Independent
B
L
A
C
K
S
E
A
More clues leading to the result BLACK SEA
- Georgia’s neighbour is lazy worker, according to Spooner
- Earliest of books doesn’t have enough on each significant body of water
- Wants to live around a watery Eurasian expanse
- Deficiency in rebuilt base where part of Russian navy is
- Main lover almost hasn’t got inside
- Spooner’s sagging worker needs vast amount of water
Buddy explains!
The straight part
We know that "significant body of water" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case significant body of water = black 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.