Interrupts what may be wrong in a canal boat? (6,2)
I believe the answer is:
barges in
'interrupts' is the definition.
(barging in is a kind of interrupting)
'what may be wrong in a canal boat?' is the wordplay.
I cannot quite see how this works, but
'wrong' could be 'sin' (I've seen this before) and 'sin' is located in the answer.
'a' is present in the answer.
'boat?' could be 'e' and 'e' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for barges in that I've seen is " Gate-crashes, enters forcefully".)