Rave involved hunts for double dose of ecstasy to swallow (7)
I believe the answer is:
enthuse
'rave' is the definition.
(to rave about something is to enthuse about it)
'involved hunts for double dose of ecstasy to swallow' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'hunts' is 'nthus' which is present in the answer.
'ecstasy' could be 'e' (informal term for the drug) and 'e' is found within the answer.
A single letter 'e' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for enthuse that I've seen before include "Excite - show excitement" , "Seem keen" , "Express keen interest" , "Appear keenly interested" , "Wax lyrical (over)" .)