Gifts bestowed in important letter read out? (8)

I believe the answer is:
largesse
'gifts bestowed in' is the definition.
'largesse' can be an answer for 'gifts' (thesaurus). I am not sure about the 'bestowed in' bit.
'important letter read out?' is the wordplay.
'important' becomes 'large' ('large' can be similar in meaning to 'important').
'letter read out?' becomes 'sse' (I can't justify this - if you can you should believe this answer much more).
'large'+'sse'='LARGESSE'
Can you help me to learn more?
(Other definitions for largesse that I've seen before include "Magnanimous bestowal of gifts" , "Generous disposal of gifts" , "Generosity in gift-giving" , "charity" , "Generosity in giving gifts" .)