Crossword Genius

Another name for polo? (5)

Ross

I believe the answer is:

marco

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

'polo?' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'another name' is the wordplay.
I cannot really see how this works, but
'name' could be 'mar' and 'mar' is located in the answer.
The remaining letters 'co' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).

'for' is the link.

Can you help me to learn more?

(Other definitions for marco that I've seen before include "gondolier" , "- - Polo, traveller" .)

I've seen this clue in the Evening Standard.
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