Strange game is about idols (6)
I believe the answer is:
images
'idols' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Perhaps there's a link between them I don't understand?
'strange game is about' is the wordplay.
'strange' indicates an anagram.
'about' indicates putting letters inside.
'game' with letters rearranged gives 'mage'.
'mage' going inside 'is' is 'IMAGES'.
Can you help me to learn more?
(Other definitions for images that I've seen before include "Likenesses or mental pictures" , "'Reflections, likenesses (6)'" , "Pictures; metaphors" , "visions" , "These doubles could be spitting" .)