Tedious but seems not enough to weary everyone (8)
I believe the answer is:
tiresome
'tedious' is the definition.
(I know that tedious can be written as tiresome)
'weary everyone' is the wordplay.
'weary' becomes 'tire' (synonyms).
'everyone' becomes 'some' (I can't explain this - if you can you should believe this answer much more).
'tire'+'some'='TIRESOME'
'but seems not enough to' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for tiresome that I've seen before include "Trying, vexatious" , "'Tedious, irksome (8)'" , "Annoying, being a nuisance" , "Tedious and boring" , "Annoying, makes you fed up" .)