Get paper, perhaps, from halt on eastern railway (10)
I believe the answer is:
'get paper perhaps' is the definition.
(paper is a type of stationery item)
'halt on eastern railway' is the wordplay.
'halt' becomes 'station' (halt is a type of railway station).
'on' says to put letters next to each other.
'eastern' becomes 'e'.
'railway' becomes 'ry' (abbreviation for railway).
'from' is the link.
(Other definitions for stationery that I've seen before include "The papers, etc", "Files etc", "Various items in paper", "Treasury tags, for instance", "Writing material".)