Deceitful behaviour put bend on railway (9)
I believe the answer is:
chicanery
'deceitful behaviour' is the definition.
(chicanery means deceptive behaviour)
'bend on railway' is the wordplay.
'bend' becomes 'chicane' (I have seen 'Double bend' mean 'chicane' so perhaps 'bend' could also mean 'chicane').
'on railway' becomes 'ry' (I've seen this in other clues).
'chicane'+'ry'='CHICANERY'
'put' is the link.
(Other definitions for chicanery that I've seen before include "dishonest practices" , "cheating" , "Double-dealing" , "Trickery used to gain advantage, duplicity" , "legal tricks" .)