Nurses interrupting diagnosis tersely (7)
I believe the answer is:
sisters
'nurses' is the definition.
(female nurses are often addressed as sister)
'interrupting diagnosis tersely' is the wordplay.
'SISTERS' is hidden within the letters.
But, I'm unsure how this is indicated.
Can you help me to learn more?
(Other definitions for sisters that I've seen before include "Female siblings" , "Relatives in hospital?" , "Resists for relatives" , "Nuns - nurses - siblings" , "Family relatives" .)