Branch of maths (8)
'branch of maths' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for algebra that I've seen before include "Part of the maths syllabus" , "Symbol-based branch of mathematics" , "letters here set out the problem" , "Numbers and letters branch of maths" , "subject with many unknowns" .)
'branch of maths' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for geometry that I've seen before include "Branch of mathematics" , "Maths dealing with lines, angles etc - Euclid was good at it" , "branch of mathrmatics" , "Euclid's science" , "Shape and arrangement of parts" .)