Look like a very quiet listener (6)
I believe the answer is:
appear
'look like' is the definition.
(thesaurus)
'a very quiet listener' is the wordplay.
'very quiet' becomes 'pp' (musical abbreviation for pianissimo).
'listener' becomes 'ear' (body part which hears or listens).
'a'+'pp'+'ear'='APPEAR'
(Other definitions for appear that I've seen before include "Present oneself" , "Look - materialise" , "Come into sight, materialise" , "Come on the market" , "be published" .)