One near hysterical after park's closure?! (5)
I believe the answer is:
karen
'one near hysterical after park's closure?' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe there's a link between them I don't understand?
'one near hysterical after park's closure?' is the wordplay.
'one' becomes 'a' (a thing is one thing).
'near hysterical' becomes 'ren' (I can't justify this - if you can you should believe this answer much more).
'after' means one lot of letters go next to another.
'closure?' says to take the final letters (the letter which closes the word).
The final letter of 'park' is 'k'.
'a'+'ren'='aren'
'aren' put after 'k' is 'KAREN'.
Can you help me to learn more?
(Other definitions for karen that I've seen before include "Girl" , "Girl's name - ethnic Thai in Burma" , "oriental language" , "One at home in 15 across [AARHUS]" , "Carpenter of note" .)