The most common and most likely answer to this crossword clue is the 7 letter word NIGGLES
I've seen this crossword clue in Financial Times
N
I
G
G
L
E
S
More clues leading to the result NIGGLES
Buddy explains!

The straight part
We know that "Worries" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case worries = niggles.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 NIGGLES mean?
NIGGLES noun- A minor complaint or problem.
- Small, cramped handwriting.
- To trifle with; to deceive; to mock.
- To use, spend, or do in a petty or trifling manner.
- To dwell too much on minor points or on trifling details.
- To fidget, fiddle, be restless.