The most common and most likely answer to this crossword clue is the 8 letter word SPELLING
I've seen this crossword clue in The Guardian
S
P
E
L
L
I
N
G
More clues leading to the result SPELLING
- Letter-writing skill of witches and wizards?
- Process of character identification, magic?
- TV producer calling one character at a time
- Relieving pressure, going outside
- Charming activity of bee?
- Magic writing skill
- Doing relief work‘s charming
- Enchanting activity of bee?
- What witches learn at school?
- Merchandising including piano lesson for a young student
Buddy explains!

The straight part
We know that "Relieving" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case relieving = spelling.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 SPELLING mean?
SPELLING verb- To put under the influence of a spell; to affect by a spell; to bewitch; to fascinate; to charm.
- To read (something) as though letter by letter; to peruse slowly or with effort.
- (sometimes with “out”) To write or say the letters that form a word or part of a word.
- To be able to write or say the letters that form words.
- Of letters: to compose (a word).
- (with “out”) To clarify; to explain in detail.
- To indicate that (some event) will occur.
- To constitute; to measure.
- To speak, to declaim.
- To tell; to relate; to teach.
- To work in place of (someone).
- To rest (someone or something), to give someone or something a rest or break.
- To rest from work for a time.
- 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.