Crossword Genius

Bouncer in city house (4)

Ross

I believe the answer is:

echo

'bouncer' is the definition.
(echoes bounce off things)

'city house' is the wordplay.
'city' becomes 'EC' (the City of London postcode).
'house' becomes 'ho' (abbreviation for house).
'ec'+'ho'='ECHO'

'in' is the link.

(Other definitions for echo that I've seen before include "Comms code word for E" , "Reflection of sound waves" , "Audio effect" , "Be suggestive of" , "Sound bouncing back" .)

I've seen this clue in The Guardian.
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