Crystal ball gazer (4)
I believe the answer is:
seer
'crystal ball gazer' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for seer that I've seen before include "One having visions of the future" , "Distinguishing quality" , "Clairvoyant, visionary" , "One who knows the future" , "Oracle or clairvoyant" .)