The most common and most likely answer to this crossword clue is the 2 plus 3 letter word IN USE
I've seen this crossword clue in The Daily Telegraph
I
N
U
S
E
More clues leading to the result IN USE
- Not entirely laid back, bees uniquely busy
- Without outside assistance, Head Office going to be engaged
- Busy at home, oddly unseen
- Raise tax on custom working
- Busy career’s not beginning to inspire us
- Operating without losing initial energy
- Being employed by us to stab popular Estonian leader
- Engaged by popular demand
- Employed during practice
- Getting employment that is besetting many students
Buddy explains!
The straight part
We know that "Occupied" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case occupied = in use.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.