The most common and most likely answer to this crossword clue is the 9 letter word NAVIGABLE
I've seen this crossword clue in The Guardian
N
A
V
I
G
A
B
L
E
More clues leading to the result NAVIGABLE
- Lava, being fluid, can be passed through
- Easy to get around in one, vehicle brought back by bishop in storm
- Presumably deep enough for the Spanish carrier, and Russian, heading to port
- Can sail through via Bengal, perhaps
- It's new in Mumbai, a triangular section that's passable
- Terrible man climbing over part of wall — safe to go through?
Buddy explains!
The straight part
We know that "can be passed through" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case can be passed through = navigable.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 NAVIGABLE mean?
NAVIGABLE adjective- (of a body of water) Capable of being navigated; deep enough and wide enough to afford passage to vessels.
- (of a boat) Seaworthy; in a navigable state; steerable.
- (of a balloon) Steerable, dirigible.
- Easy to navigate.