Crossword Genius

One of the Marx Brothers takes on a barbed dart (7)

Ross

I believe the answer is:

harpoon

I'm a little stuck... Click here to teach me more about this clue!

'a barbed dart' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I don't see?

'one of the marx brothers takes on' is the wordplay.
'one of the marx brothers' becomes 'harpo' (comedian Harpo Marx).
'takes' is a charade indicator (letters next to each other).
'harpo'+'on'='HARPOON'

Can you help me to learn more?

(Other definitions for harpoon that I've seen before include "Barbed whale-spear" , "Whaler's weapon" , "Whale spear" , "Whale-catching missile" , "Barbed whaling spear" .)

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