Shipping hazards kill barnacles, eiders, razorbills, gannets and seagulls in the beginning (8)
I believe the answer is:
icebergs
'shipping hazards' is the definition.
(I've seen this in another clue)
'kill barnacles eiders razorbills gannets and seagulls in the beginning' is the wordplay.
I cannot really understand how this works, but
'kill' could be 'ice' (slang term) and 'ice' is found in the answer.
The remaining letters 'bergs' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for icebergs that I've seen before include "Frozen mountains in the sea" , "Arctic sea hazards" , "Large masses of frozen water" , "Large masses floating at sea in polar regions" , "Only small parts can be seen above the water" .)