Modest about home gleaming (5)
I believe the answer is:
shiny
'gleaming' is the definition.
(thesaurus)
'modest about home' is the wordplay.
'modest' becomes 'shy'.
'about' indicates putting letters inside.
'home' becomes 'in' ('he's home' can mean 'he's in').
'shy' placed around 'in' is 'SHINY'.
(Other definitions for shiny that I've seen before include "Gleaming" , "Smooth and polished" , "Polished, reflective" , "Smooth and reflective" , "Lustrous, glossy" .)