A little malingerer, Everyman will watch online channel (10)
I believe the answer is:
millstream
'channel' is the definition.
(thesaurus)
'a little malingerer everyman will watch online' is the wordplay.
'a little' says to take the initial letters.
'everyman will' becomes 'I'll' (I will when Everyman is the setter).
'watch online' becomes 'stream' (I've seen this in another clue).
The initial letter of 'malingerer' is 'm'.
'm'+'ill'+'stream'='MILLSTREAM'
(Other definitions for millstream that I've seen before include "Flow providing power to wheel" , "Race to power" , "Current power source" , "wheel turner?" .)