Sign from galleon (3)
I believe the answer is:
leo
'sign' is the definition.
(star sign)
'from galleon' is the wordplay.
'from' says the answer is hidden in the clue.
'LEO' is hidden in the letters of 'galleon'.
(Other definitions for leo that I've seen before include "certain stars" , "one of several popes" , "Cancer, ___, Virgo" , "Man" , "Horoscope sign" .)