Red Cross course (6)
I believe the answer is:
triage
'red cross course' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for triage that I've seen before include "Hospital reception" , "Assignment of urgency to illnesses" , "Hospital procedure" , "Selection and allocation for medical aid" , "Sorting and allocating aid on the basis of need" .)