The most common and most likely answer to this crossword clue is the 2 plus 4 letter word IN GEAR
I've seen this crossword clue in Financial Times
I
N
G
E
A
R
More clues leading to the result IN GEAR
- Dressed and ready to drive?
- Dressed, ready to drive off?
- Working, stopping 11 earning
- Some voting early, having shifted from neutral
- Performing effectively, wearing clobber
- Where hammer found nailing lid on gradually, working effectively
- Gloomy Dean meets Arab, dressed and ready to go
- Dressed and ready to move
- Popular equipment when driving
- Nothing earned, I’ll keep working
Buddy explains!

The straight part
We know that "working" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case working = in gear.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.