Pedal boat at sea can be taken in (9)

I believe the answer is:

adoptable

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'taken in' is the definition.
Both the definition and answer are adjectives. Maybe you can see a link between them that I don't see?

'pedal boat at sea' is the wordplay.
'at sea' indicates an anagram.
'pedal'+'boat'='pedalboat'
'pedalboat' anagrammed gives 'ADOPTABLE'.

'can be' acts as a link.

Can you help me to learn more?

(Other definitions for adoptable that I've seen before include "like an orphan baby?" , "Able to be taken up" .)

I've seen this clue in The Irish Times.

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