Coming into play (8)
I believe the answer is:
entrance
This clue could be a double definition.
'coming' is the first definition.
(thesaurus)
'play' is the second definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe there's a link between them I don't understand?
'into' is the link.
Can you help me to learn more?
(Other definitions for entrance that I've seen before include "it's common, say, for some children to sit" , "Enchant" , "Vestibule" , "Capture" , "seventeen [POSTERN], perhaps" .)