Strike out (6)
'strike out' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for delete that I've seen before include "Take out" , "Edit out" , "Expunge, erase" , "Scrub" , "Eras" .)
But I've got no explanation for this one! Could you help me understand?
(Other definitions for remove that I've seen before include "Take something away" , "class in a number of schools" , "Subtract" , "Take away; form in some schools" , "Abolish" .)