Lion found in galleon (3)
I believe the answer is:
leo
'lion' is the definition.
(thesaurus)
'in galleon' is the wordplay.
'in' indicates a hidden word.
'LEO' can be found hidden inside 'galleon'.
'found' acts as a link.
(Other definitions for leo that I've seen before include "Horoscope sign" , "Lion constellation" , "Lion sign of the Zodiac" , "Astrological sign" , "Cancer, ___, Virgo" .)