Sound that will blend in with the others? (4)
I believe the answer is:
tone
'sound that will blend' is the definition.
'tone' can be an answer for 'sound' (tone is a kind of sound). I'm not sure about the rest of the definition.
'with the others?' is the wordplay.
'with' is a charade indicator (letters next to each other).
'the' becomes 't' (the is pronounced as a 't' sound in some dialects).
'others?' becomes 'one' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
't' next to 'one' is 'TONE'.
'in' is the link.
Can you help me to learn more?
(Other definitions for tone that I've seen before include "Sound signal on a telephone" , "Shade" , "Sound - style" , "Mood" , "Quality of a person's voice" .)