Glimmer (4)
'glimmer' is the definition.
(I know that glimmer can be written as gleam)
This is all the clue.
(Other definitions for gleam that I've seen before include "Sparkle, glimmer" , "Brightness" , "Moderate glow" , "shaft" , "Glimmer, lustre" .)
'glimmer' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for glow that I've seen before include "Brightness" , "Emit light and heat without flame" , "Shine with warmth, emotion" , "Shine with heat" , "Send out light and heat without flame" .)