Supreme garment (7)
I believe the answer is:
overall
This clue might be a double definition.
'supreme' is the first definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?
'garment' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for overall that I've seen before include "generally speaking" , "It protects a worker" , "Including everything" , "Inclusive" , "Boilersuit" .)