Fancy ecstasy can be found in little drinkie (5)
I believe the answer is:
dream
'fancy' is the definition.
(both can mean a fantasy)
'ecstasy can be found in little drinkie' is the wordplay.
I cannot really see how this works, but
'ecstasy' could be 'e' (informal term for the drug) and 'e' is found within the answer.
'be' could be 'am' and 'am' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for dream that I've seen before include "Nocturnal fantasy" , "Vision - very pleasant person" , "Fantasy; imagine" , "Cherished hope; reverie" , "Think vaguely" .)