Unclear if magazine's accepting article to replace others originally (5)
I believe the answer is:
vague
'unclear' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for vague that I've seen before include "Unclearly defined" , "Ill-defined" , "Nebulous" , "Not clearly expressed or perceived" , "Indistinct or not clearly expressed" .)