The most common and most likely answer to this crossword clue is the 6 letter word CUT-IN
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Buddy explains!

The straight part
We know that "Interrupt" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case interrupt = cut-in.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does CUT-IN mean?
CUT-IN noun- A section of film inserted into another sequence.
- (by extension) A visual sequence focusing on a character's face or body while they perform a special move.
- The situation where the performer of a musical work receives royalties for each performance, despite not having composed it.