The most common and most likely answer to this crossword clue is the 11 letter word ORTHOGRAPHY
O
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Buddy explains!
The straight part
We know that "using right characters" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case using right characters = orthography.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 ORTHOGRAPHY mean?
ORTHOGRAPHY noun- The study of correct spelling according to established usage.
- The aspect of language study concerned with letters and their sequences in words.
- Orthographic projection; especially its use to draw an elevation, vertical projection etc. of a building.
- The act, practice, ability, or subject of forming words with letters, or of reading the letters of words; orthography.
- The manner of spelling of words; correct spelling.
- A specific spelling of a word.
- A spelling test or spelling bee.