Ineffective player may be seen going to train (9)
I believe the answer is:
passenger
'train' is the definition.
(passenger train is a kind of train)
'ineffective player may be seen' is the wordplay.
I cannot really see how this works, but
'be' could be 'pass' (passing is a kind of being) and 'pass' is found within the answer.
This explanation may well be incorrect...
'going to' acts as a link.
Can you help me to learn more?
(Other definitions for passenger that I've seen before include "Traveller not driving" , "one transferred by coach, perhaps" , "One's driven" , "Rider" , "One travelling" .)