Common sound coming from some Bosch washers (5)
I believe the answer is:
schwa
'common sound' is the definition.
'schwa' can be an answer for 'sound' (schwa is a kind of sound). I am not sure about the 'common' bit.
'coming from some bosch washers' is the wordplay.
'coming from' indicates the answer is hidden within the clue.
'SCHWA' is hidden in the letters of 'some bosch washers'.
Can you help me to learn more?
(Other definitions for schwa that I've seen before include "Stress-free sound" , "Unstressed vowel (phonetics)" , "Indistinct sound" , "sound unstressed" , "Uh' sound" .)