Ace supporter nursing broken leg in class (7)
I believe the answer is:
algebra
'class' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'ace supporter nursing broken leg' is the wordplay.
'ace' becomes 'a' (abbreviation).
'supporter' becomes 'bra' (a bra gives support to breasts).
'nursing' indicates putting letters inside.
'broken' indicates anagramming the letters.
'a'+'bra'='abra'
'leg' is an anagram of 'lge'.
'abra' enclosing 'lge' is 'ALGEBRA'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for algebra that I've seen before include "Symbolic mathematics" , "Branch of generalised arithmetic" , "part of curriculum" , "Symbol-based mathematical calculation" , "Part of the maths syllabus" .)