Be inclined to buzz off (5)

I believe the answer is:

slope

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'be inclined' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

(Other definitions for slope that I've seen before include "Inclination" , "See 28" , "Be inclined" , "Rake; Barchester chaplain" , "decamp" .)

I've seen this clue in the Evening Standard.

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