Stress that may be acute? (6)
I believe the answer is:
I believe this clue is a double definition.
'stress' is the first definition.
(accent can mean to emphasise or stress)
'acute?' is the second definition.
(acute is a kind of accent)
'that may be' acts as a link.
(Other definitions for accent that I've seen before include "Regional speech characteristic" , "Grave, perhaps" , "Tone of voice" , "intensity" , "Pronunciation in a locality" .)