Last Anzac to capture some lines (6)
I believe the answer is:
stanza
'some lines' is the definition.
(group of lines in a poem)
'last anzac to capture' is the wordplay.
'to capture' says the answer is hidden in the clue (I've seen 'captured' mean this).
'STANZA' can be found hidden inside 'last anzac'.
(Other definitions for stanza that I've seen before include "Lines of poetry forming a pattern" , "Group of poetic lines" , "Group of lines of verse" , "Chunk of poetry" , "Group of lines in a poem, play, etc" .)