Note apps were developed for provider of information (9)
I believe the answer is:
newspaper
'provider of information' is the definition.
'newspaper' can be an answer for 'information' (thesaurus). I am not sure about the 'provider of' bit.
'note apps were developed' is the wordplay.
'note' becomes 'n' (abbreviation).
'developed' indicates anagramming the letters.
'apps'+'were'='appswere'
'appswere' anagrammed gives 'ewspaper'.
'n'+'ewspaper'='NEWSPAPER'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for newspaper that I've seen before include "Journal" , "Publication on folded sheets" , "part of the media" , "It's (mainly) black and white, and read all over!" , "Daily or weekly publication, keeps us abreast" .)