Cryptic crossword clue
Six normally start off, as far as one can see 8

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

I've seen this crossword clue in Financial Times
V
I
S
U
A
L
L
Y


Buddy explains!

The straight part
We know that "as far as one can see" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case as far as one can see = visually.
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 VISUALLY mean?

VISUALLY adverb
  1. By means of sight.

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