Crossword Genius

Policy that may be laid down by ruler (4)

Ross

I believe the answer is:

line

I believe this clue is a double definition.

'policy' is the first definition.
(as in the party line)

'that may be laid down by ruler' is the second definition.
(you might draw a line using a ruler)

(Other definitions for line that I've seen before include "Wrinkle; phone link" , "business" , "Row - occupation" , "Long mark; direction" , "Fill" .)

I've seen this clue in The Times.
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