He strikes one as a forcing bat (6)
I believe the answer is:
hitter
'he strikes one as a forcing' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'bat' is the wordplay.
I cannot quite see how this works, but
'bat' could be 'hit' (I've seen this in another clue) and 'hit' is located in the answer.
The remaining letters 'ter' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for hitter that I've seen is " Boxer with a hard punch".)