Collaboration with offender and my Lord on the radio? (7)

I believe the answer is:

synergy

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'collaboration' is the definition.
(I've seen this in another clue)

I can't explain the rest of the clue.

(Other definitions for synergy that I've seen before include "Mutual cooperation producing greater effect" , "Productive cooperation" , "Coordinated action" , "Beneficial interaction" , "Extra benefit of working together" .)

I've seen this clue in The Guardian.

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