As worn by a Bobby at closing time? (4)
I believe the answer is:
robe
'as' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for robe that I've seen before include "Clerical garment" , "Dressing-gown" , "Old cloak for Boer" , "official dress" , "habit" .)