Bad cold that is yielding (6)

I believe the answer is:

docile

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'is yielding' is the definition.
(similar in meaning)

I don't understand how the remainder of the clue works.

(Other definitions for docile that I've seen before include "Manageable" , "Willing to obey, not aggressive" , "Easily handled or managed" , "Gentle and teachable" , "Easily managed and trainable" .)

I've seen this clue in The Globe and Mail.

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