Ineffective (7)

I think it could be either:

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5-5

useless

'ineffective' is the definition.
(associated in meaning)

This is all the clue.

(Other definitions for useless that I've seen before include "Of no practical or worthwhile application" , "idle" , "Having no beneficial function" , "Worth zilch" , "Poor" .)

I've seen this clue in The Guardian and The Telegraph.

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