The most common and most likely answer to this crossword clue is the 7 letter word SUMATRA
S
U
M
A
T
R
A
More clues leading to the result SUMATRA
- Graduate absorbed in Sanskrit works comes to island
- Part of Indonesia shown in retrospective series from Jakarta museum
- Terrible traumas in Indonesian island
- Amateurs having no energy to move round island
- Squally ____ could give you special trauma
- Island’s Sanskrit sayings arts graduate collected
- Island's old rules about rudiments of martial arts
- Problem with a craft going around island
- Island having problem, a journey finishing halfway through
- What may cause traumas at sea?
Buddy explains!

The straight part
We know that "Squally" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case squally = sumatra.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.