Crossword Genius

Complex opens with a traumatic 'Much Ado About Nothing' (1,5,2,1,6)

Ross

I believe the answer is:

a storm in a teacup

'much ado about nothing' is the definition.
(I've seen this before)

'complex opens with a traumatic' is the wordplay.
'complex' indicates anagramming the letters.
'with' says to put letters next to each other.
'opens'+'a'+'traumatic'='opensatraumatic'
'opensatraumatic' anagrammed gives 'A STORM IN A TEACUP'.

(Other definitions for a storm in a teacup that I've seen before include "Much Ado about Nothing" , "too much for a trifle" .)

I've seen this clue in The Independent.
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.