Run, man, run! He may stop him (5,5)

I believe the answer is:

extra cover

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'run he may stop him' is the definition.
The definition suggests a singular noun which matches the answer.

'run man' is the wordplay.
'run' becomes 'extra' (cricket run).
'man' becomes 'cover' (I can't explain this - if you can you should believe this answer much more).
'extra'+'cover'='EXTRA COVER'

Can you help me to learn more?

(Other definitions for extra cover that I've seen before include "Cricket fielder - more insurance?" , "Greater insurance" , "Cricketer" .)

I've seen this clue in The Guardian.

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