Unless you're very familiar with comic book lore, you probably don't know the backstory to how Kate Bishop became a superhero. To cut a long story short, Clint Barton decided he was bored with being Hawkeye and started moonlighting as a ninja called Ronin instead. It was a strange time, fans hated it, and everything soon went back to normal. In the meantime, though, we had a new Hawkeye in the shape of Kate Bishop.
Bishop didn't just rock up at Avengers HQ and pick up the title; she was a promising Young Avenger who caught the eye of Captain America, who awarded her the bow and the name by his personal decree. The outfit as seen in this image couldn't be more 1960s if it tried, and it's more civilian than it is 'superhero,' but then Hawkeye doesn't have super-powers, so that's understandable. We're less happy with the 'adorable archer' nickname that they tried to push on her, but she was a product of her time.