Crossword Genius

Of direct descent (6)

Ross

I believe the answer is:

lineal

'of direct descent' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for lineal that I've seen before include "In a line as, say, a descendant" , "One-dimensional" , "In a straight row" , "In line of descendants" , "Having only one dimension" .)

I've seen this clue in The New York Times, the King Feature Syndicate and the Newsday.com.
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