Emphasize a modern complaint (6)
I believe the answer is:
stress
'emphasize' is the definition.
(I know that emphasize is a more specific form of emphasize)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for stress that I've seen before include "Emphasis: result often of being under pressure" , "Emphasis on anxiety?" , "Draw attention to" , "State mental or emotional strain" , "Underline - tension" .)