One politician showing bad spirit (3)
I believe the answer is:
imp
'bad spirit' is the definition.
'imp' can be an answer for 'spirit' (I have seen 'Evil spirit ' mean 'imp' so perhaps 'spirit' could also mean 'imp'). I am not sure about the 'bad' bit.
'one politician' is the wordplay.
'one' becomes 'i' (Roman numeral).
'politician' becomes 'MP' (Member of Parliament).
'i'+'mp'='IMP'
'showing' is the link.
Can you help me to learn more?
(Other definitions for imp that I've seen before include "Elf" , "Rascal" , "A small mischievous devil" , "Mischievous creature" , "Mischievous monkey" .)