Some kleptomaniacs can even take seaweed! (4)

I believe the answer is:

kelp

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'seaweed' is the definition.
(I've seen this before)

'some kleptomaniacs can even' is the wordplay.
'some' suggests taking the first letters.
'can even' becomes 'elp' (I am not sure about this - if you are sure you should believe this answer much more).
The initial letter of 'kleptomaniacs' is 'k'.
'k'+'elp'='KELP'

'take' is the link.

Can you help me to learn more?

(Other definitions for kelp that I've seen before include "Large seaweeds with leathery fronds" , "Algae" , "Tough brown seaweed" , "Type of finch" , "Type of seaweed" .)

I've seen this clue in the Evening Standard.

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