Bearing working at home with a bit of light music (8)
I believe the answer is:
sonatina
'music' is the definition.
(I've seen this before)
'bearing working at home with a bit of light' is the wordplay.
'bearing' means one lot of letters goes inside another.
'working' becomes 'on' (on can mean working or activated).
'home' becomes 'in' ('he's home' can mean 'he's in').
'with' is a charade indicator (letters next to each other).
'a bit of light' becomes 'sa' (I can't explain this - if you can you should give a lot more credence to this answer).
'on'+'at'+'in'='onatin'
'onatin' put within 'sa' is 'SONATINA'.
Can you help me to learn more?
(Other definitions for sonatina that I've seen before include "Simple musical work" , "little work" , "Short instrumental piece" , "Piece of music" , "short composition" .)