Beats from clubs; dance away on ecstasy tablets (8)
I believe the answer is:
cadences
'beats' is the definition.
('cadence' can be a synonym of 'beat')
'clubs dance away on ecstasy tablets' is the wordplay.
'clubs' becomes 'c' (abbreviation used in card games such as bridge).
'away' indicates an anagram (letters move away from their original places).
'on ecstasy tablets' becomes 'es' (I can't justify this - if you can you should believe this answer much more).
'dance' is an anagram of 'adenc'.
'c'+'adenc'+'es'='CADENCES'
'from' acts as a link.
Can you help me to learn more?
(Other definitions for cadences that I've seen before include "Rises and falls of voice in speaking" , "rhythmic beats" , "Modulations or inflections of the voice" .)