Roguish and dry but not quiet (4)
I believe the answer is:
arch
'roguish' is the definition.
(I've seen this before)
'dry but not quiet' is the wordplay.
'dry' becomes 'parch' (parching is a kind of drying).
'but not' indicates named letters should be taken away.
'quiet' becomes 'p' (music symbol for 'piano').
'parch' with 'p' taken away is 'ARCH'.
'and' acts as a link.
(Other definitions for arch that I've seen before include "Roguish - chief - supporter" , "Foremost" , "Curve that spans an opening" , "Consummate" , "Teasing; part of foot" .)