Everyman's seen with a strategy game (it's a stage) (5)
I believe the answer is:
imago
'a stage' is the definition.
(I know that imago is a development stage of animal)
'everyman's seen with a strategy game' is the wordplay.
I cannot really see how this works, but
'everyman's' could be 'im' (where the crossword setter is 'Everyman') and 'im' is found within the answer.
'a' is present in the answer.
'game' could be 'go' (go is a board game) and 'go' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for imago that I've seen before include "in the developmental stage" , "A mental picture" , "being immature?" , "Adult insect after metamorphosis" , "Insect at end of life" .)