Crossword Genius

More than one star which was once used to navigate (4)

Ross

I believe the answer is:

argo

This clue is a double definition.

'more than one star' is the first definition.
(Argo was historically considered a constellation)

'which was once used to navigate' is the second definition.
(ship in Greek myth)

(Other definitions for argo that I've seen before include "Old sailing vessel" , "Fabulous ship" , "Constellation; ship" , "Jason's vessel" , "Jason's craft" .)

I've seen this clue in The Times.
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