Show power in second challenge that ousts king (9)
I believe the answer is:
spectacle
'show' is the definition.
(I've seen this before)
'power in second challenge that ousts king' is the wordplay.
I cannot quite see how this works, but
'power' could be 'pe' (P.E. is an example) and 'pe' is found within the answer.
'second' could be 's' (common abbreviation) and 's' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for spectacle that I've seen before include "Interesting phenomenon - show" , "curiosity" , "Lavish entertainment" , "of which a pair should improve 25 [SIGHT]" , "Remarkable sight" .)