Something shell-like from the sea, really (3)

I believe the answer is:

ear

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'something shell-like' is the definition.
I can't tell whether this defines the answer.

'from the sea really' is the wordplay.
'from' indicates the answer is hidden within the clue.
'EAR' is hidden within 'sea really'.

Can you help me to learn more?

(Other definitions for ear that I've seen before include "Shell-like; corn" , "Hammer in this" , "willingness to listen" , "Place for a plug" , "one hears" .)

I've seen this clue in the Evening Standard.

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