The most common and most likely answer to this crossword clue is the 7 plus 4 plus 4 letter word STRETCH ONES LEGS
S
T
R
E
T
C
H
O
N
E
S
L
E
G
S
More clues leading to the result STRETCH ONES LEGS
Buddy explains!
The straight part
We know that "Move around a bit" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case move around a bit = stretch ones legs.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.