Like that seabird towards the back? (6)
I believe the answer is:
astern
'towards the back?' is the definition.
(I've seen this before)
'like that seabird' is the wordplay.
'like' becomes 'as'.
'that seabird' becomes 'tern' (tern is a kind of seabird).
'as'+'tern'='ASTERN'
(Other definitions for astern that I've seen before include "Towards rear of a vessel" , "(In relation to ship) behind" , "Ran set (anag.)" , "back for sailors" , "Toward the tail of a vessel" .)