Energy expelled by one sensitive to inflammatory material (6)

I believe the answer is:

tinder

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'material' is the definition.
(I have seen 'Combustible material ' mean 'tinder' so perhaps 'material' could also mean 'tinder')

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

Can you help me to learn more?

(Other definitions for tinder that I've seen before include "Touchwood" , "Dry material for starting fire" , "Dry stuff to light fire with" , "Combustible material" , "Dry material to start a fire" .)

I've seen this clue in The Hindu.

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