The most common and most likely answer to this crossword clue is the 5 letter word TYPED
I've seen this crossword clue in The Daily Telegraph
T
Y
P
E
D
More clues leading to the result TYPED
Buddy explains!
The straight part
We know that "wrote on a keyboard" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case wrote on a keyboard = typed.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 TYPED mean?
TYPED 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.
- Typewritten
- (of a variable, expression, or value) Having a specific data type.
- (of a programming language) In which variables are typed.