Sign from the galleon (3)
I believe the answer is:
leo
'sign' is the definition.
(Leo is an example)
'from the galleon' is the wordplay.
'from' indicates the answer is hidden within the clue.
'LEO' can be found hidden inside 'galleon'.
(Other definitions for leo that I've seen before include "Zodiacal lion" , "Singer-songwriter Sayer, b. 1949" , "Astrological sign" , "Cancer, ___, Virgo" , "of pride" .)