Unappreciative person lighting fire here? (7)

I believe the answer is:

ingrate

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'unappreciative person' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for ingrate that I've seen before include "without a word of thanks?" , "Thankless wretch" , "Tangier (anag)" , "Ungrateful person" , "He doesn't appreciate" .)

I've seen this clue in The Sun.

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