It's obvious what cricketers don't want — to risk injury in nets? (9)
I believe the answer is:
overtrain
'risk injury in nets?' is the definition.
(nets can mean cricket training)
'it's obvious what cricketers don't want' is the wordplay.
'it's obvious' becomes 'overt' (similar in meaning).
'what cricketers don't want' becomes 'rain' (rain might mean a cricket match is called off).
'overt'+'rain'='OVERTRAIN'
'to' acts as a link.
(Other definitions for overtrain that I've seen before include "Spend too much time on exercises" , "Prepare too hard" , "Run past peak, perhaps" .)