The most common and most likely answer to this crossword clue is the 6 letter word REMOTE
I've seen this crossword clue in The Guardian
R
E
M
O
T
E
More clues leading to the result REMOTE
- Distant meteor disintegrated
- Where motel not entirely off the beaten track
- Not very close regarding small item
- King to behave theatrically to get control
- Slim volume put back in centre section of bureau
- Controller of programmes is standoffish
- Far-off meteor exploded
- Small and extremely radioactive speck of dust
- Right to reject poet’s third book as inaccessible?
- Slight offensive to me, rebuff not entirely uplifting
Buddy explains!

The straight part
We know that "Slim" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case slim = remote.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 REMOTE mean?
REMOTE noun- An element of broadcast programming originating away from the station's or show's control room.
- To connect to a computer from a remote location.
- At a distance; disconnected.
- Distant or otherwise inaccessible.
- (especially with respect to likelihood) Slight.
- Emotionally detached.
- A device used to operate an appliance (such as a television), vehicle or mechanical toy from a short distance away.
- A means of doing something from a distance.