Point for a number of patients? (6)
I believe the answer is:
needle
'point' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
(Other definitions for needle that I've seen before include "Rile" , "Item for sewer" , "Stiff leaf of a conifer" , "Persistently annoy" , "Goad, provoke" .)