Kew signal misconstrued by feeble ones (9)

I believe the answer is:

weaklings

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'feeble ones' is the definition.
Although both the answer and definition are plural nouns, I cannot understand how one could define the other.

'kew signal misconstrued' is the wordplay.
'misconstrued' indicates anagramming the letters.
'kew'+'signal'='kewsignal'
'kewsignal' is an anagram of 'WEAKLINGS'.

'by' acts as a link.

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

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