Stops consuming pastry dish to provide an impetus (4-5)
I believe the answer is:
kick-start
'dish to provide an impetus' is the definition.
I can't tell whether this defines the answer.
'stops consuming pastry' is the wordplay.
I cannot really understand how this works, but
'pastry' could be 'tart' (type of pastry) and 'tart' is present in the answer.
The remaining letters 'kicks' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for kick-start that I've seen before include "Stimulate" , "Activate (business or motorbike!)" , "How to get a motorcycle going" , "Provide an initial impetus" , "Get something going" .)