Spilt beer left by a revolting fellow! (5)
I believe the answer is:
rebel
'a revolting fellow' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'spilt beer left' is the wordplay.
'spilt' indicates anagramming the letters.
'left' becomes 'l' (common abbreviation).
'beer' is an anagram of 'rebe'.
'rebe'+'l'='REBEL'
'by' is the link.
Can you help me to learn more?
(Other definitions for rebel that I've seen before include "Insurgent, mutineer" , "One resisting authority" , "Kick over the traces" , "One who opposes the powerful" , "anarchist?" .)