One stirring tea bloke mixed with rum, right? (12)
I believe the answer is:
troublemaker
'one stirring' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'tea bloke mixed with rum right?' is the wordplay.
'mixed with' indicates anagramming the letters.
'right?' becomes 'r' (common abbreviation).
'tea'+'bloke'='teabloke'
'teabloke' mixed up with 'rum' can make 'troublemake'.
'troublemake'+'r'='TROUBLEMAKER'
Can you help me to learn more?
(Other definitions for troublemaker that I've seen before include "Deliberate causer of problems" , "Incendiary" , "Inciter of unrest" , "Agitator" , "source of agitation" .)