Queen's consort reported additional stimulation (6)

I believe the answer is:

fillip

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'stimulation' is the definition.
(fillip is a kind of stimulation)

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

Can you help me to learn more?

(Other definitions for fillip that I've seen before include "Stimulus or incentive" , "lift" , "Spur - incentive" , "If pill could be used as a stimulant" , "Stimulus (sounds like a boy!)" .)

I've seen this clue in the Sydney Morning Herald.

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