Make allusions (5)
I believe the answer is:
refer
'make allusions' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for refer that I've seen before include "If special treatment needed, GP might do this" , "Relate" , "Pertain or cite" , "Make an allusion, or send on" , "Send a patient to a specialist" .)