Cake shop originally included in postman’s short run (10)
I believe the answer is:
patisserie
'cake shop' is the definition.
(I've seen this before)
'originally included in postman's short run' is the wordplay.
I cannot really understand how this works, but
'run' could be 'r' (cricket abbreviation) and 'r' is present in the answer.
'postman' could be 'pat' (children's TV character Postman Pat) and 'pat' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for patisserie that I've seen before include "food shop" , "store for Brownies?" , "where cakes are sold" , "Cake and pastry shop" , "Its cakes are fancy" .)