Crossword Genius

Opera upset bass with a sudden movement involving no warmth (9)

Ross

I believe the answer is:

adiabatic

'involving no warmth' is the definition.

'opera upset bass with a sudden movement' is the wordplay.
'opera' becomes 'aida' (Aida is an example).
'upset' says the letters should be written in reverse.
'bass' becomes 'b' (musical abbreviation).
'with' says to put letters next to each other.
'sudden movement' becomes 'tic'.
'aida' reversed gives 'adia'.
'adia'+'b'+'a'+'tic'='ADIABATIC'

I've seen this clue in The Independent.
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