The most common and most likely answer to this crossword clue is the 2 plus 7 letter word NO PROBLEM
I've seen this crossword clue in The Guardian
N
O
P
R
O
B
L
E
M
More clues leading to the result NO PROBLEM
- Amateur Aussie singer backed to avoid a fine
- Edit blooper in new medium? Easy peasy!
- Brain teaser missing from newspaper? Don’t mention it!
- Don’t worry, if some reported missing?
- Close to oven, half-baked bloomer keeps soft, don’t worry!
- Not one question that’s easy
- Number puzzle that’s easy
- Am then picking up Scary Spice – it’s easy
- Not a puzzle? You’re welcome!
- Not one puzzle that’s all right
Buddy explains!

The straight part
We know that "Don’t worry" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case don’t worry = no problem.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.