Not as much following final, lonely one left out continuously? (9)
I believe the answer is:
endlessly
'continuously?' is the definition.
('endlessly' can be a synonym of 'continuously')
'not as much following final lonely one left out' is the wordplay.
'not as much' becomes 'less' (similar in meaning).
'following' is a charade indicator (letters next to each other).
'final' becomes 'end' (synonyms).
'lonely one left out' becomes 'ly' (I can't justify this - if you can you should believe this answer much more).
'less' after 'end' is 'endless'.
'endless'+'ly'='ENDLESSLY'
Can you help me to learn more?
(Other definitions for endlessly that I've seen before include "Ad infinitum" , "Ceaselessly" , "all the time" , "Limitlessly" , "in perpetuity" .)