The most common and most likely answer to this crossword clue is the 4 letter word IMPS
I've seen this crossword clue in The Daily Telegraph
I
M
P
S
More clues leading to the result IMPS
- Current house-sitters making repairs
- More than one troublemaker is nabbing member of the House
- Not a vessel for spirits? Near, near
- Military policeman is about to see mischief-makers
- Military policeman is about to get mischief-makers
- Redcap interrupting lives shoots as before
- Troublemakers head off the meek?
- More than one mischief-maker is ringing politician
- More than one trouble-maker is besieging politician
- Rascals regularly hid my post
Buddy explains!

The straight part
We know that "More than one mischief-maker" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case more than one mischief-maker = imps.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 IMPS mean?
IMPS noun- A small, mischievous sprite, or a malevolent supernatural creature, somewhat comparable to a demon but smaller and less powerful.
- A mischievous child.
- A baby Tasmanian devil.
- A young shoot of a plant, tree etc.
- A scion, offspring; a child.
- Something added to, or united with, another, to lengthen it out or repair it, such as an addition to a beehive; a feather inserted in a broken wing of a bird; or a length of twisted hair in a fishing line.
- To plant or engraft.
- To graft, implant; to set or fix.
- To engraft (feathers) into a bird's wing.
- To eke out, strengthen, enlarge.