Is it too much, one half of a couple being named Thora? (8)
I believe the answer is:
plethora
'is it too much' is the definition.
(I've seen this before)
'one half of a couple being named thora?' is the wordplay.
'one half of' means to take half the letters.
'a couple' becomes 'pr'.
'being named' becomes 'le' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'pr' cut in half is 'p'.
'p'+'le'+'thora'='PLETHORA'
Can you help me to learn more?
(Other definitions for plethora that I've seen before include "Abundant supply" , "Excess, glut" , "Glut, over-abundance" , "(A) glut (of something)" , "almost too much" .)