Like a seabird in the back of a ship (6)

I believe the answer is:

astern

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'back of a ship' is the definition.
'astern' can be an answer for 'back' (I've seen this in another clue). I am not sure about the 'of a ship' bit.

'like a seabird' is the wordplay.
'like' becomes 'as'.
'a seabird' becomes 'tern' (tern is a kind of seabird).
'as'+'tern'='ASTERN'

'in the' acts as a link.

Can you help me to learn more?

(Other definitions for astern that I've seen before include "Towards a ship's rear" , "Nautically behind" , "Towards the rear of boat" , "Towards the rear of a ship" , "(In relation to ship) behind" .)

I've seen this clue in The Telegraph.

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