It's flaming shocking! (5)

I believe the answer is:

lurid

I believe this clue is a double definition.

'it's flaming' is the first definition.
(thesaurus)

'shocking' is the second definition.
('lurid' can be a synonym of 'shocking')

(Other definitions for lurid that I've seen before include "Gloomily threatening" , "Sensational or dazzling" , "Ghastly in appearance" , "In glaring colours, shockingly vivid" , "Fiery - sensational" .)

I've seen this clue in the Evening Standard.

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