Computer devices after backing up becoming smoother (6)
I believe the answer is:
pumice
'smoother' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'computer devices after backing up' is the wordplay.
'computer devices' becomes 'mice' (I've seen this in another clue).
'after' is a charade indicator (letters next to each other).
'backing' says the letters should be written backwards.
'up' in reverse letter order is 'pu'.
'mice' put after 'pu' is 'PUMICE'.
'becoming' is the link.
Can you help me to learn more?
(Other definitions for pumice that I've seen before include "Mineral" , "Light porous stone used as polishing powder" , "Volcanic-rock scourer" , "Light form of solidified lava" , "Porous lava" .)