The most common and most likely answer to this crossword clue is the 8 letter word SEAPLANE
S
E
A
P
L
A
N
E
More clues leading to the result SEAPLANE
- 10 understand a scheme’s boring
- Aircraft witness simply reported
- Mode of transport to leak, we hear, on road
- Understand bottling a strategy for such a transporter
- Aircraft tore down esplanade, by dropping dive-bomb initially
- A design seen in picture is of a vehicle
- Internally revise a plan eliminating craft
- Find out about a blueprint for specialized aircraft
- Black’s proposal to get English aircraft
- Transport smoother under water? Yes and no
Buddy explains!

The straight part
We know that "A/" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a/ = seaplane.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 SEAPLANE mean?
SEAPLANE noun- Any aircraft capable of taking off from, and alighting on the surface of water.