Remove bones (from) (6)
I believe the answer is:
fillet
'remove bones from' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for fillet that I've seen before include "Remove bone from (meat or fish)" , "Remove bones of (fish)" , "Cut of steak; ribbon strip" , "Thick piece of boneless meat or fish" , "Choice piece of boneless meat (6)" .)