Crossword Genius

What follows tango in hotel? (4)

Ross

I believe the answer is:

echo

I'm a little stuck... Click here to teach me more about this clue!

This clue might be a double definition.

'what follows tango' is the first definition.
I know that 'tango' relates to this answer.

'hotel?' is the second definition.
I know that 'hotel' relates to this answer. I also know that both the answer and definition are singular nouns

'in' acts as a link.

Can you help me to learn more?

(Other definitions for echo that I've seen before include "One who slavishly copies" , "Reminder" , "Sound bouncing back" , "Say again or imitate" , "repeated answer" .)

I've seen this clue in The Everyman puzzle in The Observer.
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