Crossword Genius

Reversal in clue to react? (5,4)

Ross

I believe the answer is:

about turn

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'reversal' is the definition.
(I know that about turn is a type of reversal)

'clue to react?' is the wordplay.
'clue' becomes 'about' (I can't justify this - if you can you should believe this answer much more).
'to react?' becomes 'turn' (reacting is a kind of turning).
'about'+'turn'='ABOUT-TURN'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for about turn that I've seen before include "Total change of direction" , "Major change of attitude" , "Face the opposite way" , "Total change of policy" , "Contrary progression" .)

I've seen this clue in The Guardian.
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