Bluff before mid-morning, note (7)
I believe the answer is:
pretend
'bluff' is the definition.
(I've seen this before)
'before mid-morning note' is the wordplay.
'before' becomes 'pre' (prefix meaning 'before').
'mid-morning' becomes 'ten' (I've seen this in another clue).
'note' becomes 'D' (musical note).
'pre'+'ten'+'d'='PRETEND'
(Other definitions for pretend that I've seen before include "Imagine" , "Profess falsely" , "make a false claim" , "Behave unnaturally" , "Suppose" .)