Lacking delicacy, time to be more passive? (8)

I believe the answer is:

tactless

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'lacking delicacy' is the definition.
(being tactful is being delicate or considerate)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for tactless that I've seen before include "Gaffe-prone" , "Lacking skill in handling delicate situations" , "Lacking diplomacy" , "Lacking sensitivity, saying the wrong things" , "Without subtlety or sensitivity" .)

I've seen this clue in The Guardian.

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