Those dashing young chaps from Sheffield? (6)

I believe the answer is:

blades

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'chaps from sheffield?' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe they are linked in a way I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for blades that I've seen before include "Metal runners on skates" , "They cut" , "Football club nickname" , "Cutting parts of knives" , "cutters" .)

I've seen this clue in the Evening Standard.

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