The most common and most likely answer to this crossword clue is the 7 letter word LOOSEST
I've seen this crossword clue in The Times
L
O
O
S
E
S
T
Buddy explains!
The straight part
We know that "Most imprecise" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case most imprecise = loosest.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 LOOSEST mean?
LOOSEST adjective- Not fixed in place tightly or firmly.
- Not held or packaged together.
- Not under control.
- Not fitting closely
- Not compact.
- Relaxed.
- Not precise or exact; vague; indeterminate.
- Indiscreet.
- (somewhat dated) Free from moral restraint; immoral, unchaste.
- Not being in the possession of any competing team during a game.
- Not costive; having lax bowels.