This criminal pinches low energy drink (8)
I believe the answer is:
smoothie
'drink' is the definition.
(smoothie is a type of drink)
'this criminal pinches low energy' is the wordplay.
'criminal' indicates anagramming the letters.
'pinches' means one lot of letters goes inside another (pinch can mean to steal).
'low' becomes 'moo' (both can mean to make the noise of a cow).
'energy' becomes 'e' (physics symbol as in E=mc2).
'this' with letters rearranged gives 'sthi'.
'sthi' going around 'moo' is 'smoothi'.
'smoothi'+'e'='SMOOTHIE'
(Other definitions for smoothie that I've seen before include "Thick, drink of pureed fruit" , "Thick fruity drink - charmer" , "cold and thick" , "Drink made with pur?ed fruit" , "Smarmy type" .)