A dreamer ordering sugar (8)
I believe the answer is:
demerara
'sugar' is the definition.
(I've seen this before)
'a dreamer ordering' is the wordplay.
'ordering' is an anagram indicator.
'a'+'dreamer'='adreamer'
'adreamer' with letters rearranged gives 'DEMERARA'.
(Other definitions for demerara that I've seen before include "(Light-brown) sugar" , "Rum" , "sugar - and alcohol" , "That's sweet!" , "South American river - sugar" .)