Emphasise anxiety (6)
I believe the answer is:
stress
This clue is a double definition.
'emphasise' is the first definition.
(I know that emphasise can be written as stress)
'anxiety' is the second definition.
(anxiety is stress or tension)
(Other definitions for stress that I've seen before include "Emphasise the pressure" , "Lay emphasis on - it's a strain" , "Draw attention to" , "result of being overworked" , "Strain or accentuate" .)