Crossword Genius

One is enough to make batsmen cross! (3)

Ross

I believe the answer is:

run

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

'cross' is the definition.
(thesaurus)

'one is enough to make batsmen' is the wordplay.
I cannot quite see how this works, but
'one' could be 'un' (northern English dialect form of 'one') and 'un' is found in the answer.
A single letter 'r' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for run that I've seen before include "Unit of score in cricket" , "A point scored in cricket" , "Operate; flow" , "On the . . . - fleeing from pursuit" , "goal for England player?" .)

I've seen this clue in the Evening Standard.
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