Oh, you are, I hear, a different vessel from the lot of us (9)
I believe the answer is:
ourselves
'lot of us' is the definition.
'ourselves' can be an answer for 'us' (us refers to ourselves). I am not sure about the 'lot of' bit.
'oh you are i hear a different vessel' is the wordplay.
'oh' becomes 'o'.
'you' becomes 'u' (homophones).
'i hear' shows a homophone (sound like).
'a different' indicates an anagram (letters placed in a different order).
'are' sounds like 'r'.
'vessel' is an anagram of 'selves'.
'o'+'u'+'r'+'selves'='OURSELVES'
'from the' acts as a link.
Can you help me to learn more?
(Other definitions for ourselves that I've seen before include "We or us personally" , "Emphatically us" , "Us, reflexively" , "See 16" .)