Inspires with a blazing determination (5)

I believe the answer is:

fires

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'inspires' is the definition.
The answer and definition can be both to do with human feelings as well as being verbs in their -s form.
Maybe they are linked in a way I don't understand?

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for fires that I've seen before include "Sacks; conflagrations" , "Cashiers" .)

I've seen this clue in the Evening Standard.

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