Initially has sort of connection with railway’s sound management (9)
I believe the answer is:
husbandry
'sound management' is the definition.
'initially has sort of connection with railway's' is the wordplay.
'initially' says to take the initial letters.
'sort of connection' becomes 'usb' (computing abbreviation).
'with' becomes 'and' (I've seen this before**).
'railway' becomes 'ry' (abbreviation for railway).
The initial letter of 'has' is 'h'.
'h'+'usb'+'and'+'ry'='HUSBANDRY'
(Other definitions for husbandry that I've seen before include "The business of farming" , "Farm business" , "The care of crops and animals" , "farm management" , "land management" .)