All but the end of the article is fine (4)
I believe the answer is:
thin
'is fine' is the definition.
(similar in meaning)
'all but the end' is the wordplay.
'all but' means to remove the last letter ('all but' can mean 'almost' or 'nearly').
'the end' becomes 'thing' (thing is a kind of end).
'thing' with its final letter removed is 'THIN'.
'of the article' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for thin that I've seen before include "Slender, narrow" , "Lacking substance; not dense" , "With little thickness" , "Made of light material" , "Scrawny" .)