The most common and most likely answer to this crossword clue is the 7 letter word OCEANIC
O
C
E
A
N
I
C
More clues leading to the result OCEANIC
- A nice company formation — describes the South Sea Bubble
- Polynesian perhaps cocaine sent into a frenzy
- Marine‘s cocaine supply
- Abuse of cocaine widespread?
- Marine fixed canoe with integrated circuit
- What can describe voyage that’s over – can ice drifting?
- Touched, auntie regularly beginning to cry – with this sort of result?
- Big cocaine bust
- In sea with rickety canoe, one getting cold
- Vast quantity of crack cocaine
Buddy explains!

The straight part
We know that "Vast" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case vast = oceanic.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.
What does OCEANIC mean?
OCEANIC adjective- Of or relating to the ocean.
- Living in, produced by, or frequenting the ocean.
- Resembling an ocean in vastness or extent.
- Having a climate that has a relatively small difference in temperature between the warmest and coldest times of the year, and relatively high rainfall