The most common and most likely answer to this crossword clue is the 6 letter word TYPING
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Buddy explains!
The straight part
We know that "composing text" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case composing text = typing.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 TYPING mean?
TYPING verb- To put text on paper using a typewriter.
- To enter text or commands into a computer using a keyboard.
- To determine the blood type of.
- To represent by a type, model, or symbol beforehand; to prefigure.
- To furnish an expression or copy of; to represent; to typify.
- To categorize into types.
- Assigning or classification by type.
- The act of typing on a keyboard.