The most common and most likely answer to this crossword clue is the 5 plus 3 letter word TABLE TOP
I've seen this crossword clue in Independent
T
A
B
L
E
T
O
P
Buddy explains!
The straight part
We know that "Where to put your iPad, perhaps, at work" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case where to put your ipad, perhaps, at work = table top.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.