Oldies at dance left alone (8)
I believe the answer is:
isolated
'left alone' is the definition.
'isolated' can be an answer for 'alone' (similar in meaning). I'm not sure about the 'left' bit.
'oldies at dance' is the wordplay.
'dance' is an anagram indicator.
'oldies'+'at'='oldiesat'
'oldiesat' is an anagram of 'ISOLATED'.
Can you help me to learn more?
(Other definitions for isolated that I've seen before include "Alone, set apart" , "(Left) on one's own" , "Placed alone" , "Single" , "Segregated" .)