Cartoon character’s news story curtailed by having opening trimmed (6-3)

'cartoon character's' is the definition.
(I've seen this before)

'curtailed by having opening trimmed' is the wordplay.
'curtailed by' becomes 'scooby' (I can't explain this - if you can you should believe this answer much more).
'having' is a charade indicator (letters next to each other).
'opening' becomes 'door' (a door is an opening).
'trimmed' means to remove the last letter (the final letter is trimmed off).
'door' with its last letter removed is 'doo'.
'scooby'+'doo'='SCOOBY-DOO'

'news story' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?