One politician in difficult issue (3)
I believe the answer is:
imp
'difficult issue' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'one politician' is the wordplay.
'one' becomes 'i' (Roman numeral).
'politician' becomes 'MP' (Member of Parliament).
'i'+'mp'='IMP'
'in' is the link.
Can you help me to learn more?
(Other definitions for imp that I've seen before include "Scallywag" , "Mischievous fairy No.1" , "Scamp" , "one likely to cause trouble" , "Mischievous monkey" .)