Playing nice new record, 'Firestarter' (10)

I believe the answer is:

incendiary

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'firestarter' is the definition.
I can't tell whether this definition defines the answer.

'playing nice new record' is the wordplay.
'playing' is an anagram indicator.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'record' becomes 'diary' (I've seen this in another clue).
'nice' anagrammed gives 'ince'.
'ince'+'n'+'diary'='INCENDIARY'

Can you help me to learn more?

(Other definitions for incendiary that I've seen before include "Fire-raiser" , "bomb" , "getting people excited" , "of a provocative nature" , "Likely to stir up trouble" .)

I've seen this clue in The Guardian.

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