get a line on

get a line on idiom
Also, have a line on. Acquire information about something or someone, come to know. For example, Sue got a line on some possible tennis partners, or The realtor has a line on a number of vacant apartments. Similarly, give someone a line on means “provide information about,” as in The librarian gave me a line on the books I would need. This idiom uses line in the sense of “a direct course.” [c. 1900] Also see get a fix on.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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