Brief mob about incendiary device (8)

I believe the answer is:

firebomb

'incendiary device' is the definition.
(I know that Firebomb is a incendiary device)

'brief mob about' is the wordplay.
'about' indicates an anagram.
'brief'+'mob'='briefmob'
'briefmob' anagrammed gives 'FIREBOMB'.

(Other definitions for firebomb that I've seen before include "Attack with incendiary" , "Incendiary explosive device" .)

I've seen this clue in The Independent.

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