The most common and most likely answer to this crossword clue is the 8 letter word AKINESIA
I've seen this crossword clue in The Guardian
A
K
I
N
E
S
I
A
More clues leading to the result AKINESIA
Buddy explains!

The straight part
We know that "Problem with movement/Problem with movement" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case problem with movement/problem with movement = akinesia.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 AKINESIA mean?
AKINESIA noun- The loss of the ability to control motor muscles.