Here are the possible solutions for one is often worn on a uniform clue
Answer
Clue
Relevancy
emblem
Clue
One is often worn on a uniform
Definition
to represent with a symbolic device
sweatiervest
Clue
A waistcoat worn in summer, compared to one worn in winter?
shoe
Clue
It may not be worn when it's worn
kneehighs
Clue
School uniform footwear, often
nametag
Clue
Uniform part, often
Definition
a tag bearing one's name
plaid
Clue
School uniform pattern, often
Definition
a long piece of twilled woollen cloth, usually with a chequered or tartan pattern, worn over the shoulder as the outer article of the traditional Highland dress