Cryptic crossword clue
Sound observation, using a quote 6

The most common and most likely answer to this crossword clue is the 6 letter word CITING

I've seen this crossword clue in The Guardian
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Buddy explains!

The straight part
We know that "using a quote" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case using a quote = citing.
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 CITING mean?

CITING verb
  1. To quote; to repeat, as a passage from a book, or the words of another.
  2. To list the source(s) from which one took information, words or literary or verbal context.
  3. To summon officially or authoritatively to appear in court.
CITING noun
  1. Citation.

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