Extends message, suggesting only honest communication? (5,3)

I believe the answer is:

spins out

'extends' is the definition.
(spinning out is a kind of extending)

I cannot understand how the rest of the clue works.

(Other definitions for spins out that I've seen before include "Extends" , "explanation for using fast bowlers only?" , "Prolongs" .)

I've seen this clue in The Guardian.

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