English Queen entertaining politician, or another monarch (7)
I believe the answer is:
emperor
'another monarch' is the definition.
'emperor' can be an answer for 'monarch' (emperor is a kind of monarch). I'm not certain of the 'another' bit.
'english queen entertaining politician or' is the wordplay.
'english' becomes 'E' (abbreviation).
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'entertaining' means one lot of letters goes inside another.
'politician' becomes 'mp' (Member of Parliament).
'e'+'er'='eer'
'eer' going around 'mp' is 'emper'.
'emper'+'or'='EMPEROR'
(Other definitions for emperor that I've seen before include "Large colourful butterfly" , "Beethoven piano concerto, Op. 73" , "Beethoven's Piano Concerto No. 5 in E-flat major" , "Napoleon Bonaparte, for instance" , "Male ruler of a group of countries" .)