The most common and most likely answer to this crossword clue is the 6 letter word WANTED
I've seen this crossword clue in The Times
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More clues leading to the result WANTED
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The straight part
We know that "sought by police" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sought by police = wanted.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 WANTED mean?
WANTED verb- To wish for or desire (something); to feel a need or desire for; to crave or demand.
- (in particular) To wish, desire or demand to see, have the presence of or do business with.
- To desire (to experience desire); to wish.
- (usually second person, often future tense) To be advised to do something (compare should, ought).
- (now colloquial) To lack and be in need of or require (something, such as a noun or verbal noun).
- (now rare) To have occasion for (something requisite or useful); to require or need.
- To be lacking or deficient or absent.
- To be in a state of destitution; to be needy; to lack.
- To lack and be without, to not have (something).
- (by extension) To lack and (be able to) do without.
- Wished for; desired; sought
- Subject to immediate detainment by law enforcement authorities on sight.