Ignoramus interrupts a ripper sob-story (4-6)

I believe the answer is:

tear-jerker

I'm a little stuck... Click here to teach me more about this clue!

'story' is the definition.
(I have seen 'Sentimental story ' mean 'tear-jerker' so perhaps 'story' could also mean 'tear-jerker')

'ignoramus interrupts a ripper' is the wordplay.
'ignoramus' becomes 'jerk' (I can't justify this - if you can you should give a lot more credence to this answer).
'interrupts' indicates putting letters inside.
'a ripper' becomes 'tearer' (I've seen this in another clue).
'jerk' going into 'tearer' is 'TEAR-JERKER'.

'sob' acts as a link.
I am not very happy about this link. It may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for tear-jerker that I've seen before include "Sad sentimental story" , "Highly sentimental story, film etc" , "Extravagantly sentimental book, play, etc" , "Weepie" , "tale that's emotional" .)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.