Being frequently interrupted prevents pie being made (4-5)

'being frequently interrupted' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'prevents pie being made' is the wordplay.
I cannot quite understand how this works, but
'prevents' could be 'stops' (stopping is a kind of preventing) and 'stops' is present in the answer.
'pie' could be 'tart' (I've seen this before) and 'tart' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?