Some concoct agonising contests here? (7)
I believe the answer is:
octagon
'here?' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'some concoct agonising contests' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'OCTAGON' is hidden in the letters of 'concoct agonising contests'.
Can you help me to learn more?
(Other definitions for octagon that I've seen before include "Eight-sided shape" , "with eight angles" , "regular form" , "Figure of many sides" , "Shape of a square with the corners cut off" .)