Crossword Genius

A name that's to me, pointless (3)

Ross

I believe the answer is:

tom

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

'a name' is the definition.

'to me pointless' is the wordplay.
I cannot really see how this works, but
'to' is found in the answer.
A single letter 'm' remains which might be clued in a way I don't see.
This explanation may well be incorrect...

'that's' is the link.

Can you help me to learn more?

(Other definitions for tom that I've seen before include "Repeated twice, this becomes an African drum" , "Cruise" , "Hoyden" , "queen's consort?" , "Jerry's cartoon adversary" .)

I've seen this clue in the Evening Standard.
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