Puffin, for one (3)
I believe the answer is:
auk
'puffin for one' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for auk that I've seen before include "Black/white northern diver" , "Short-winged seabird" , "Northern sea bird with short narrow wings" , "Black-and-white diving bird of northern seas" , "Northern seabird with small narrow wings" .)