Crossword Genius

Lengthy account of a gas explosion (4)

Ross

I believe the answer is:

saga

'lengthy account' is the definition.
(a saga is a lengthy narrative)

'a gas explosion' is the wordplay.
'explosion' indicates anagramming the letters.
'a'+'gas'='agas'
'agas' anagrammed gives 'SAGA'.

'of' acts as a link.

(Other definitions for saga that I've seen before include "Long narrative" , "Icelandic or Norse story" , "Heroic narrative" , "Tale of heroes" , "Long and involved story" .)

I've seen this clue in the Evening Standard.
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