Second player on baseball field done for (8)
I believe the answer is:
spitcher
'baseball field done for' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'second player' is the wordplay.
I cannot really see how this works, but
'second' could be 's' (common abbreviation) and 's' is found in the answer.
'player' could be 'pitcher' (I have seen 'American player' mean 'pitcher' so perhaps 'player' could also mean 'pitcher') and 'pitcher' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'on' is the link.
Can you help me to learn more?
(Another definition for spitcher that I've seen is " done for in the navy?".)