The most common and most likely answer to this crossword clue is the 9 letter word EXTREMITY
I've seen this crossword clue in Financial Times
E
X
T
R
E
M
I
T
Y
Buddy explains!

The straight part
We know that "hand, perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case hand, perhaps = extremity.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 EXTREMITY mean?
EXTREMITY noun- The most extreme or furthest point of something.
- An extreme measure.
- A hand or foot.
- A limb.