The most common and most likely answer to this crossword clue is the 5 plus 3 letter word SHIFT KEY
I've seen this crossword clue in The Times
S
H
I
F
T
K
E
Y
More clues leading to the result SHIFT KEY
- Dress code’s solution perhaps for one often depressed
- Workers given essential device for producing capital?
- Hours of work important for device on computer
- It gives access to a capital if the sky changes
- Working hours critical for one of those depressed in the office?
- Sell important means to create capital
- Help for creating CV on a computer?
- What makes it into computer science etc?
- What’ll turn us into most powerful country?
- Typist’s requirement? A light dress — crucial
Buddy explains!

The straight part
We know that "device on computer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case device on computer = shift key.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.