Unionists embracing Northern Irish outfit (5)
I believe the answer is:
tunic
This clue could be a double definition.
'unionists embracing' is the first definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'northern irish outfit' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
Can you help me to learn more?
(Other definitions for tunic that I've seen before include "Dress for soldier" , "piece of clothing" , "Loose sleeveless garment" , "Short uniform coat" , "Smock" .)