Sentence:  ... incidentally, our correspondent tells of a West Indian who applied for a job at Kings Cross as motion <WSD>greaser</WSD> - but with no idea of what he would have to grease and why. Invited to find out and return within a month, he did, and nowadays the Kings Cross engines are as efficiently greased as any on B.R. 
Meaning of the word marked with <WSD> tags:  Someone or something that greases (applies grease).