Multiple choice concealing answer (4)

I believe the answer is:

echo

'answer' is the definition.
(thesaurus)

'multiple choice concealing' is the wordplay.
'concealing' says the answer is hidden in the clue.
'ECHO' can be found hidden inside 'multiple choice'.

(Other definitions for echo that I've seen before include "Reflected radar beam" , "letter we hear" , "Repeating of sound" , "Comms code word for E" , "Sound bouncing back" .)

I've seen this clue in The Telegraph.

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