Game in disorder - it may take some solving (6)
I believe the answer is:
enigma
'it may take some solving' is the definition.
The definition suggests a singular noun which matches the answer.
'game in disorder' is the wordplay.
'disorder' indicates an anagram (a disordered version of the letters).
'game'+'in'='gamein'
'gamein' with letters rearranged gives 'ENIGMA'.
Can you help me to learn more?
(Other definitions for enigma that I've seen before include "Difficult problem" , "Puzzle of gamine (6)," , "Mysterious person" , "Puzzling person/thing" , "cryptic puzzle!" .)