The most common and most likely answer to this crossword clue is the 7 letter word NERVOUS
I've seen this crossword clue in Financial Times
N
E
R
V
O
U
S
More clues leading to the result NERVOUS
- Fearful of such a breakdown
- Tense new soldier returned to meet you in Paris
- Worried travelling over in North America
- Shy queen with very piercing intelligence
- Apprehensive over bursting into sunset
- Daft souvenir one dropped, being flustered
- In agitated state over silly group of students outside
- Ravenous itinerant dropping skinned rat in a stew
- On edge seeing Venus, or agitated
- Common sense keeps the Queen very worried
Buddy explains!

The straight part
We know that "Worried" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case worried = nervous.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 NERVOUS mean?
NERVOUS adjective- Of sinews and tendons.
- Of nerves.