Galley providing portion of lamb, I remember (6)
I believe the answer is:
bireme
'galley' is the definition.
(thesaurus)
'portion of lamb i remember' is the wordplay.
'portion of' indicates the answer is hidden within the clue.
'BIREME' is hidden in the letters of 'lamb i remember'.
'providing' acts as a link.
(Other definitions for bireme that I've seen before include "old vessel?" , "Old craft with two banks of oars" , "Ancient vessel" , "with two tiers" , "Ancient oared warship" .)