Pull back in to ratify marine flier (7)

I believe the answer is:

seagull

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'marine flier' is the definition.
'seagull' can be an answer for 'flier' (seagull is a kind of birdanimal). I'm not certain of the 'marine' bit.

'pull back in to ratify' is the wordplay.
'pull' becomes 'lug' (I've seen this before).
'back' shows that the letters should be reversed in order.
'in' indicates putting letters inside.
'to ratify' becomes 'seal' (I've seen this before).
'lug' written backwards gives 'gul'.
'gul' going into 'seal' is 'SEAGULL'.

Can you help me to learn more?

(Other definitions for seagull that I've seen before include "Main creature" , "Avian scavenger" , "Bird paradoxically fond of landfill sites" , "Marine bird" , "One sitting atop mast perhaps" .)

I've seen this clue in the Sydney Morning Herald.

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