In yet another way, describing queen the greatest example of this? (10)
I believe the answer is:
inequality
'example of this?' is the definition.
The definition suggests a singular noun which matches the answer.
'in yet another way describing queen the greatest' is the wordplay.
'another way' is an anagram indicator.
'describing' means one lot of letters goes inside another (describe can mean to form the outline of).
'queen' becomes 'qu' (**).
'the greatest' becomes 'ali' (film about Muhammad Ali).
'yet' anagrammed gives 'ety'.
'qu'+'ali'='quali'
'ety' going around 'quali' is 'equality'.
'in'+'equality'='INEQUALITY'
(Another definition for inequality that I've seen is " Disparity".)