Easily irritated, I will leave the City in turmoil (6)
I believe the answer is:
tetchy
'easily irritated' is the definition.
(tetchy means irritable or easily annoyed)
'i will leave the city in turmoil' is the wordplay.
'will leave' is a deletion indicator.
'in turmoil' indicates an anagram (I've seen this in other clues).
'the'+'city'='thecity'
'thecity' with 'i' removed is 'thecty'.
'thecty' anagrammed gives 'TETCHY'.
(Other definitions for tetchy that I've seen before include "Cantankerous" , "Irritable, cross" , "Fractious" , "Bad-tempered" , "Easily irritated or annoyed, narky" .)