Convey to Bellow concealing note on writing (5)
I believe the answer is:
carry
'convey' is the definition.
('carry' can be a synonym of 'convey')
'bellow concealing note on writing' is the wordplay.
'bellow' becomes 'cry'.
'concealing' is an insertion indicator.
'note' becomes 'a' (musical note).
'on' says to put letters next to each other.
'writing' becomes 'r' (I've seen this in other clues**).
'a'+'r'='ar'
'cry' going around 'ar' is 'CARRY'.
'to' is the link.
(Other definitions for carry that I've seen before include "Bear, tote" , "Move" , "Stock" , "Bring" , "Transport; transmit" .)