Let you know if the steak is coming up (6)
I believe the answer is:
fillet
'up' is the definition.
Although both the answer and definition are verbs in their base form, I don't see how they can define each other.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for fillet that I've seen before include "Cut of steak; ribbon strip" , "Alice band" , "round head?" , "Remove certain content" , "Boneless slice, of meat say" .)