Sign from galleon (3)
I believe the answer is:
leo
'sign' is the definition.
(star sign)
'from galleon' is the wordplay.
'from' indicates a hidden word.
'LEO' can be found hidden inside 'galleon'.
(Other definitions for leo that I've seen before include "certain stars" , "one of several popes" , "Cancer, ___, Virgo" , "Man" , "Horoscope sign" .)