Crossword Genius

Bright metallic element, blue (5)

Ross

I believe the answer is:

aglow

'bright' is the definition.
('aglow' can be similar in meaning to 'bright')

'metallic element blue' is the wordplay.
'metallic element' becomes 'ag' (Ag is an example**).
'blue' becomes 'low' (I've seen this in other clues).
'ag'+'low'='AGLOW'

(Other definitions for aglow that I've seen before include "Illuminated" , "Softly bright or radiant" , "Smouldering" , "Red-hot" , "emitting a steady light" .)

I've seen this clue in The Times.
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