Observe daily writing material (9)
I believe the answer is:
notepaper
'writing material' is the definition.
(I've seen this before)
'observe daily' is the wordplay.
'observe' becomes 'note' (synonyms).
'daily' becomes 'paper' (newspaper).
'note'+'paper'='NOTEPAPER'
(Other definitions for notepaper that I've seen before include "Writing material" , "What Handel used to write" , "What correspondent needs" , "Letters are sent on it" , "Sheets for writing" .)