CCCWC October competition voters’ comments on Clue no. 25

A clue to POSTICHE.
2 comments refer to this clue (from 2 competitors, 0 others)

Here is the text

Comments on the clue

1.	I didn't know ch = chestnut, but it's in Chambers. Chestnut syrup sounds horrible, but it is available. Better "swallows"?
2.	Sound clue but, in the surface reading, why a mailman? I.e. no special ring to the clue.