Know what is expected (7)
I believe the answer is:
foresee
'know' is the definition.
(I know that foresee is a type of know)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for foresee that I've seen before include "witness in advance?" , "divine" , "Envisage" , "Be aware of beforehand" , "Anticipate" .)