Insult in bar gets worker enraged (9)
I believe the answer is:
indignant
'enraged' is the definition.
(thesaurus)
'insult in bar gets worker' is the wordplay.
'insult in bar' becomes 'indign' (I can't justify this - if you can you should believe this answer much more).
'gets' is a charade indicator (letters next to each other).
'worker' becomes 'ant' (worker is a type of ant).
'indign'+'ant'='INDIGNANT'
Can you help me to learn more?
(Other definitions for indignant that I've seen before include "Felling anger over something wrong or unjust" , "somewhat angry" , "Anger at having been treated unjustly" , "Miffed" , "not happy" .)