Variation in game puzzles people (6)
I believe the answer is:
'variation in game puzzles people' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
I also know that 'puzzles' relates to this answer.
'variation in game' is the wordplay.
'variation' is an anagram indicator.
'ingame' is an anagram of 'ENIGMA'.
Can you help me to learn more?
(Other definitions for enigma that I've seen before include "Puzzling person/thing" , "Mysterious puzzle" , "There's a mystery in game" , "closed book" , "Solution to mystery" .)