Suitable sock (5)
I believe the answer is:
right
This clue could be a double definition.
'suitable' is the first definition.
(synonyms)
'sock' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
Can you help me to learn more?
(Other definitions for right that I've seen before include "Quite proper" , "straight" , "Starboard side" , "True - just claim" , "one side" .)