Quietly got up from writing (5)
I believe the answer is:
prose
'writing' is the definition.
(I've seen this in other clues)
'quietly got up' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet).
'got up' becomes 'rose' (I've seen this before).
'p'+'rose'='PROSE'
'from' acts as a link.
(Other definitions for prose that I've seen before include "Ropes (anag.)" , "Ordinary spoken or written language" , "Ordinary writing" , "Text" , "Normal written language" .)