You could wear one in a park (5)
I believe the answer is:
parka
'you' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?
'wear one in a park' is the wordplay.
'a park' can be anagrammed to 'PARKA'.
But, I'm not clear how this is indicated.
'could' is the link.
Can you help me to learn more?
(Other definitions for parka that I've seen before include "Warm, hooded coat" , "warm gear" , "jacket for cold weather" , "Hooded waterproof coat" , "Weatherproof jacket with hood" .)