Crossword Genius

Nice with sixteen riotously living (2,9)

Ross

I believe the answer is:

in existence

'living' is the definition.
(thesaurus)

'nice with sixteen riotously' is the wordplay.
'with' is a charade indicator (letters next to each other).
'riotously' indicates anagramming the letters.
'nice' put after 'sixteen' is 'sixteennice'.
'sixteennice' is an anagram of 'IN EXISTENCE'.

(Another definition for in existence that I've seen is " living".)

I've seen this clue in The Telegraph.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.