The most common and most likely answer to this crossword clue is the 10 letter word ACCENTUATE
I've seen this crossword clue in The Daily Telegraph
A
C
C
E
N
T
U
A
T
E
More clues leading to the result ACCENTUATE
- Stress a lot of US cash is involved in move
- Stress about getting caught with coin you loudly put away
- Stress fracture acute, can’t move in conclusion
- Correct, right away, to screen half of entire highlight
- Create stress as cut announced by hospital dept posh dislike in the East End
- Neat act with cue going wrong producing stress
- Highlight is a cute cat leaping across tiny space
- Cockney maybe scoffed about university causing stress
Buddy explains!

The straight part
We know that "stress" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stress = accentuate.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 ACCENTUATE mean?
ACCENTUATE verb- To pronounce with an accent or vocal stress.
- To bring out distinctly; to make more noticeable or prominent; to emphasize.
- To mark with a written accent.