Knowing about daughter selling apps (6)
I believe the answer is:
adware
'selling apps' is the definition.
'adware' can be an answer for 'apps' (I have seen 'commercial apps' mean 'adware' so perhaps 'apps' could also mean 'adware'). I'm not certain of the 'selling' bit.
'knowing about daughter' is the wordplay.
'knowing' becomes 'aware' (I've seen this before).
'about' means one lot of letters goes inside another.
'daughter' becomes 'd' (genealogical abbreviation).
'aware' going around 'd' is 'ADWARE'.
Can you help me to learn more?
(Other definitions for adware that I've seen before include "commercial apps" , "computer plug-ins?" , "web advertising programs" , "computer programs" .)