Sense instinctively (6)
I believe the answer is:
intuit
'sense instinctively' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for intuit that I've seen before include "Feel" , "Instinctively come to know" , "Perform (role) in exaggerated manner" , "Work out by instinct" , "Understand by instinct" .)