In quiet approach, make little sound (3)
I believe the answer is:
tap
'little sound' is the definition.
'tap' can be an answer for 'sound' (tapping is a kind of sounding). I'm not sure about the 'little' bit.
'in quiet approach make' is the wordplay.
'in' indicates the answer is hidden within the clue.
'TAP' can be found hidden inside 'quiet approach make'.
Can you help me to learn more?
(Other definitions for tap that I've seen before include "Flow controller; knock" , "water supply" , "In America, it's a spigot" , "Intercept; light knock" , "Water controller" .)