Refer (6)
I believe the answer is:
allude
'refer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for allude that I've seen before include "Make vague reference to" , "Refer to, speak of" , "Refer (to) in passing" , "Refe" , "Make reference to, perhaps indirectly" .)