Variation in game puzzles people (6)
I believe the answer is:
enigma
'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.
'in'+'game'='ingame'
'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" .)