Shimmer (5)
'shimmer' is the definition.
(I know that shimmer is a more specific form of gleam)
This is the entire clue.
(Other definitions for gleam that I've seen before include "Coruscate" , "Glint" , "Faint light; (quality) shine (in eyes)" , "Brief shining" , "Beam of soft light, perhaps in eye" .)
'shimmer' is the definition.
(I've seen this in another clue)
This is the entire clue.