Cryptic crossword clue
Captain, say, is wise man hanging on to a remote 8

The most common and most likely answer to this crossword clue is the 8 letter word SEAFARER

I've seen this crossword clue in Financial Times
S
E
A
F
A
R
E
R


Buddy explains!

The straight part
We know that "Captain, say" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case captain, say = seafarer.
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 SEAFARER mean?

SEAFARER noun
  1. A sailor or mariner.
  2. One who travels by sea.

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