Nothing special about discontinued milk drinks (2,5,6)
I believe the answer is:
no great shakes
'nothing special' is the definition.
(I've seen this before)
'about discontinued milk drinks' is the wordplay.
I cannot really see how this works, but
'about' could be 'rea' (I've seen this in other clues) and 'rea' is located in the answer.
'drinks' could be 'shakes' (shake is a kind of drink) and 'shakes' is present in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for no great shakes that I've seen before include "low on Richter scale?" , "nothing to write home about" , "Small earthquake" , "Nothing out of the ordinary" , "Fair" .)