In practically no time, grandmother gets love and support (10)
I believe the answer is:
nanosecond
'in practically no time' is the definition.
'nanosecond' can be an answer for 'time' (I have seen 'short time' mean 'nanosecond' so perhaps 'time' could also mean 'nanosecond'). I'm not sure about the 'in practically no' bit.
'grandmother gets love and support' is the wordplay.
'grandmother' becomes 'nan' (nan can informally mean a grandmother).
'gets' says to put letters next to each other.
'love' becomes 'o' (love means zero in tennis).
'and' is a charade indicator (letters next to each other).
'support' becomes 'second' (eg to second an idea is to support it).
'nan'+'o'+'second'='NANOSECOND'
Can you help me to learn more?
(Other definitions for nanosecond that I've seen before include "Only a little flash" , "trice" , "next to no time!" , "very brief time" , "instant?" .)