Crossword Genius

At first, cinemagoer natters rudely during tear-jerker, causing dismay (13)

Ross

I believe the answer is:

consternation

'dismay' is the definition.
(synonyms)

'at first cinemagoer natters rudely during tear-jerker' is the wordplay.
'at' means one lot of letters go next to another.
'first cinemagoer' becomes 'c' (1st letter of 'cinemagoer').
'rudely' indicates an anagram.
'during' is an insertion indicator.
'tear-jerker' becomes 'onion' (cutting onions can make you cry).
'natters' with letters rearranged gives 'sternat'.
'sternat' placed into 'onion' is 'onsternation'.
'c'+'onsternation' is 'CONSTERNATION'.

'causing' acts as a link.

(Other definitions for consternation that I've seen before include "Feelings of dismay" , "Worry" , "Dismay - cast-iron tenon (anag)" , "Anxiety, dismay" , "Alarm" .)

I've seen this clue in The Guardian.
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