Animal found in steamship, possibly (5)
I believe the answer is:
hippo
'animal' is the definition.
(I've seen this before)
'in steamship possibly' is the wordplay.
'in' says the answer is hidden in the clue.
'HIPPO' is hidden within 'steamship possibly'.
'found' is the link.
(Other definitions for hippo that I've seen before include "Afr. river mammal" , "Thick-skinned type" , "Augustine's place" , "Massive thick-skinned animal of African rivers" , "Large semi-aquatic mammal (abbr)" .)