The most common and most likely answer to this crossword clue is the 5 letter word ASTIR
I've seen this crossword clue in The Daily Telegraph
A
S
T
I
R
More clues leading to the result ASTIR
- Busy giving the pot this?
- Famous dancer doesn’t have heart or foot moving
- In motion pictures, ultimately absorbed by Ms Hayworth’s comeback
- Up and about in a prison
- Bustling atmosphere around the street
- Having got up fast, I ran to look inside
- Artist, mostly screwed up
- Animated bubbly Romeo
- Moving out of bed
- Actively moving white queen
Buddy explains!

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 ASTIR mean?
ASTIR adjective- In motion; characterized by motion.
- Out of bed; up and about.