Handyman works with corporation instead of railway (8)
I believe the answer is:
factotum
'handyman' is the definition.
(I've seen this before)
'works with corporation instead of railway' is the wordplay.
I cannot quite understand how this works, but
'corporation' could be 'tum' ('corporation' can humorously mean belly fat) and 'tum' is found in the answer.
'of' could be 'o' and 'o' is present in the answer.
The remaining letters 'fact' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for factotum that I've seen before include "Handyman" , "One employed to do various jobs" , "One who does all kinds of work" , "Employee with a variety of jobs" , "'Retainer, servant (8)'" .)